diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 20e3a7f..38206b0 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -7355,7 +7355,7 @@ snapshots:
 
   dotenv-expand@11.0.7:
     dependencies:
-      dotenv: 16.4.7
+      dotenv: 16.6.1
     optional: true
 
   dotenv@16.4.7:
diff --git a/public/images/logo.svg b/public/images/logo.svg
new file mode 100644
index 0000000..3ae6e10
--- /dev/null
+++ b/public/images/logo.svg
@@ -0,0 +1,36 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   width="180.425mm"
+   height="66.658363mm"
+   viewBox="0 0 180.425 66.658363"
+   version="1.1"
+   id="svg1"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs1" />
+  <g
+     id="layer1"
+     transform="translate(-19.117989,-118.50376)">
+    <rect
+       style="fill:#00ccff;stroke-width:4.38923"
+       id="rect1"
+       width="180.42502"
+       height="66.658356"
+       x="19.117989"
+       y="118.50375" />
+    <text
+       xml:space="preserve"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:52.6706px;font-family:'Noto Serif';-inkscape-font-specification:'Noto Serif';text-align:start;writing-mode:lr-tb;direction:ltr;text-anchor:start;fill:#f2f2f2;stroke-width:4.38923"
+       x="29.942305"
+       y="167.45377"
+       id="text1"
+       transform="scale(0.98306332,1.0172285)"><tspan
+         id="tspan1"
+         style="fill:#f2f2f2;stroke-width:4.38923"
+         x="29.942305"
+         y="167.45377">Learn!</tspan></text>
+  </g>
+</svg>
diff --git a/src/app/alphabet/MemoryCard.tsx b/src/app/(features)/alphabet/MemoryCard.tsx
similarity index 100%
rename from src/app/alphabet/MemoryCard.tsx
rename to src/app/(features)/alphabet/MemoryCard.tsx
diff --git a/src/app/alphabet/page.tsx b/src/app/(features)/alphabet/page.tsx
similarity index 100%
rename from src/app/alphabet/page.tsx
rename to src/app/(features)/alphabet/page.tsx
diff --git a/src/app/(features)/memorize/FolderSelector.tsx b/src/app/(features)/memorize/FolderSelector.tsx
new file mode 100644
index 0000000..23ced58
--- /dev/null
+++ b/src/app/(features)/memorize/FolderSelector.tsx
@@ -0,0 +1,53 @@
+"use client";
+
+import Container from "@/components/cards/Container";
+import { folder } from "../../../../generated/prisma/client";
+import { Folder } from "lucide-react";
+import { useRouter } from "next/navigation";
+import { Center } from "@/components/Center";
+
+interface FolderSelectorProps {
+  folders: (folder & { total_pairs: number })[];
+}
+
+const FolderSelector: React.FC<FolderSelectorProps> = ({ folders }) => {
+  const router = useRouter();
+  return (
+    <Center>
+      <Container className="p-6 gap-4 flex flex-col">
+        {(folders.length === 0 && (
+          <h1 className="text-2xl text-gray-900 font-light">
+            No folders found.
+          </h1>
+        )) || (
+          <>
+            <h1 className="text-2xl text-gray-900 font-light">
+              Select a folder:
+            </h1>
+            <div className="text-gray-900 border border-gray-200 rounded-2xl max-h-96 overflow-y-auto">
+              {folders.map((folder) => (
+                <div
+                  key={folder.id}
+                  onClick={() =>
+                    router.push(`/memorize?folder_id=${folder.id}`)
+                  }
+                  className="flex flex-row justify-center items-center group p-2 gap-2 hover:cursor-pointer hover:bg-gray-50"
+                >
+                  <Folder />
+                  <div className="flex-1 flex gap-2">
+                    <span className="group-hover:text-blue-500">
+                      {folder.name}
+                    </span>
+                    <span>({folder.total_pairs})</span>
+                  </div>
+                </div>
+              ))}
+            </div>
+          </>
+        )}
+      </Container>
+    </Center>
+  );
+};
+
+export default FolderSelector;
diff --git a/src/app/(features)/memorize/Memorize.tsx b/src/app/(features)/memorize/Memorize.tsx
new file mode 100644
index 0000000..72aafbe
--- /dev/null
+++ b/src/app/(features)/memorize/Memorize.tsx
@@ -0,0 +1,115 @@
+"use client";
+
+import { Center } from "@/components/Center";
+import { text_pair } from "../../../../generated/prisma/browser";
+import Container from "@/components/cards/Container";
+import { useState } from "react";
+import LightButton from "@/components/buttons/LightButton";
+import { useAudioPlayer } from "@/hooks/useAudioPlayer";
+import { getTTSAudioUrl } from "@/lib/tts";
+import { VOICES } from "@/config/locales";
+
+interface MemorizeProps {
+  textPairs: text_pair[];
+}
+
+const Memorize: React.FC<MemorizeProps> = ({ textPairs }) => {
+  const [reverse, setReverse] = useState(false);
+  const [dictation, setDictation] = useState(false);
+  const [index, setIndex] = useState(0);
+  const [show, setShow] = useState<"question" | "answer">("question");
+  const { load, play } = useAudioPlayer();
+
+  return (
+    <Center>
+      <Container className="p-6 flex flex-col gap-8 h-96 justify-center items-center">
+        {(textPairs.length > 0 && (
+          <>
+            <div className="h-36 flex flex-col gap-2 justify-start items-center font-serif text-3xl">
+              <div className="text-sm text-gray-500">
+                {index + 1}/{textPairs.length}
+              </div>
+              {dictation ? (
+                show === "question" ? (
+                  ""
+                ) : (
+                  <>
+                    <div>
+                      {reverse
+                        ? textPairs[index].text2
+                        : textPairs[index].text1}
+                    </div>
+                    <div>
+                      {reverse
+                        ? textPairs[index].text1
+                        : textPairs[index].text2}
+                    </div>
+                  </>
+                )
+              ) : (
+                <>
+                  <div>
+                    {reverse ? textPairs[index].text2 : textPairs[index].text1}
+                  </div>
+                  <div>
+                    {show === "answer"
+                      ? reverse
+                        ? textPairs[index].text1
+                        : textPairs[index].text2
+                      : ""}
+                  </div>
+                </>
+              )}
+            </div>
+            <div className="flex flex-row gap-2 items-center justify-center">
+              <LightButton
+                className="w-32"
+                onClick={async () => {
+                  if (show === "answer") {
+                    const newIndex = (index + 1) % textPairs.length;
+                    setIndex(newIndex);
+                    if (dictation)
+                      getTTSAudioUrl(
+                        textPairs[newIndex][reverse ? "text2" : "text1"],
+                        VOICES.find(
+                          (v) =>
+                            v.locale ===
+                            textPairs[newIndex][
+                              reverse ? "locale2" : "locale1"
+                            ],
+                        )!.short_name,
+                      ).then((url) => {
+                        load(url);
+                        play();
+                      });
+                  }
+                  setShow(show === "question" ? "answer" : "question");
+                }}
+              >
+                {show === "question" ? "Show Answer" : "Next"}
+              </LightButton>
+              <LightButton
+                onClick={() => {
+                  setReverse(!reverse);
+                }}
+                selected={reverse}
+              >
+                Reverse
+              </LightButton>
+              <LightButton
+                onClick={() => {
+                  setDictation(!dictation);
+                }}
+                selected={dictation}
+              >
+                Dictation
+              </LightButton>
+            </div>
+          </>
+        )) || <p>No text pairs available</p>}
+      </Container>
+    </Center>
+  );
+};
+
+export default Memorize;
diff --git a/src/app/(features)/memorize/page.tsx b/src/app/(features)/memorize/page.tsx
new file mode 100644
index 0000000..b70541b
--- /dev/null
+++ b/src/app/(features)/memorize/page.tsx
@@ -0,0 +1,45 @@
+"use server";
+
+import { redirect } from "next/navigation";
+import { getServerSession } from "next-auth";
+import {
+  getFoldersByOwner,
+  getFoldersWithTotalPairsByOwner,
+  getOwnerByFolderId,
+} from "@/lib/services/folderService";
+import { isNonNegativeInteger } from "@/lib/utils";
+import FolderSelector from "./FolderSelector";
+import Memorize from "./Memorize";
+import { getTextPairsByFolderId } from "@/lib/services/textPairService";
+
+export default async function MemorizePage({
+  searchParams,
+}: {
+  searchParams: Promise<{ folder_id?: string }>;
+}) {
+  const session = await getServerSession();
+  const username = session?.user?.name;
+
+  const t = (await searchParams).folder_id;
+  const folder_id = t ? (isNonNegativeInteger(t) ? parseInt(t) : null) : null;
+
+  if (!username)
+    redirect(
+      `/login?redirect=/memorize${folder_id ? `?folder_id=${folder_id}` : ""}`,
+    );
+
+  if (!folder_id) {
+    return (
+      <FolderSelector
+        folders={await getFoldersWithTotalPairsByOwner(username)}
+      />
+    );
+  }
+
+  const owner = await getOwnerByFolderId(folder_id);
+  if (owner !== username) {
+    return <p>无权访问该文件夹</p>;
+  }
+
+  return <Memorize textPairs={await getTextPairsByFolderId(folder_id)} />;
+}
diff --git a/src/app/srt-player/UploadArea.tsx b/src/app/(features)/srt-player/UploadArea.tsx
similarity index 100%
rename from src/app/srt-player/UploadArea.tsx
rename to src/app/(features)/srt-player/UploadArea.tsx
diff --git a/src/app/srt-player/VideoPlayer/SubtitleDisplay.tsx b/src/app/(features)/srt-player/VideoPlayer/SubtitleDisplay.tsx
similarity index 100%
rename from src/app/srt-player/VideoPlayer/SubtitleDisplay.tsx
rename to src/app/(features)/srt-player/VideoPlayer/SubtitleDisplay.tsx
diff --git a/src/app/srt-player/VideoPlayer/VideoPanel.tsx b/src/app/(features)/srt-player/VideoPlayer/VideoPanel.tsx
similarity index 100%
rename from src/app/srt-player/VideoPlayer/VideoPanel.tsx
rename to src/app/(features)/srt-player/VideoPlayer/VideoPanel.tsx
diff --git a/src/app/srt-player/page.tsx b/src/app/(features)/srt-player/page.tsx
similarity index 100%
rename from src/app/srt-player/page.tsx
rename to src/app/(features)/srt-player/page.tsx
diff --git a/src/app/srt-player/subtitle.ts b/src/app/(features)/srt-player/subtitle.ts
similarity index 100%
rename from src/app/srt-player/subtitle.ts
rename to src/app/(features)/srt-player/subtitle.ts
diff --git a/src/app/text-speaker/SaveList.tsx b/src/app/(features)/text-speaker/SaveList.tsx
similarity index 100%
rename from src/app/text-speaker/SaveList.tsx
rename to src/app/(features)/text-speaker/SaveList.tsx
diff --git a/src/app/text-speaker/page.tsx b/src/app/(features)/text-speaker/page.tsx
similarity index 100%
rename from src/app/text-speaker/page.tsx
rename to src/app/(features)/text-speaker/page.tsx
diff --git a/src/app/translator/page.tsx b/src/app/(features)/translator/page.tsx
similarity index 92%
rename from src/app/translator/page.tsx
rename to src/app/(features)/translator/page.tsx
index 031f497..bb90ecd 100644
--- a/src/app/translator/page.tsx
+++ b/src/app/(features)/translator/page.tsx
@@ -1,6 +1,7 @@
 "use client";
 
 import LightButton from "@/components/buttons/LightButton";
+import Container from "@/components/cards/Container";
 import IconClick from "@/components/IconClick";
 import IMAGES from "@/config/images";
 import { VOICES } from "@/config/locales";
@@ -15,7 +16,7 @@ import z from "zod";
 
 export default function TranslatorPage() {
   const t = useTranslations("translator");
-  
+
   const taref = useRef<HTMLTextAreaElement>(null);
   const [lang, setLang] = useState<string>("chinese");
   const [tresult, setTresult] = useState<string>("");
@@ -23,6 +24,9 @@ export default function TranslatorPage() {
   const [ipaTexts, setIpaTexts] = useState(["", ""]);
   const [processing, setProcessing] = useState(false);
   const { load, play } = useAudioPlayer();
+  const [history, setHistory] = useState<
+    z.infer<typeof TranslationHistorySchema>[]
+  >(tlso.get());
 
   const lastTTS = useRef({
     text: "",
@@ -64,6 +68,7 @@ export default function TranslatorPage() {
     const checkUpdateLocalStorage = (item: typeof newItem) => {
       if (item.text1 && item.text2 && item.locale1 && item.locale2) {
         tlsoPush(item as z.infer<typeof TranslationHistorySchema>);
+        setHistory(tlso.get());
       }
     };
     const innerStates = {
@@ -250,6 +255,18 @@ export default function TranslatorPage() {
           {t("translate")}
         </button>
       </div>
+      {history.length > 0 && (
+        <Container className="m-6 flex flex-col p-6">
+          <h1 className="text-2xl font-light">History</h1>
+          <ul className="list-disc list-inside">
+            {history.map((item, index) => (
+              <li key={index}>
+                <span className="font-bold">{item.text1}</span> - {item.text2}
+              </li>
+            ))}
+          </ul>
+        </Container>
+      )}
     </>
   );
 }
diff --git a/src/app/word-board/TheBoard.tsx b/src/app/(features)/word-board/TheBoard.tsx
similarity index 100%
rename from src/app/word-board/TheBoard.tsx
rename to src/app/(features)/word-board/TheBoard.tsx
diff --git a/src/app/word-board/page.tsx b/src/app/(features)/word-board/page.tsx
similarity index 97%
rename from src/app/word-board/page.tsx
rename to src/app/(features)/word-board/page.tsx
index 4dd1851..df40cda 100644
--- a/src/app/word-board/page.tsx
+++ b/src/app/(features)/word-board/page.tsx
@@ -1,6 +1,6 @@
 "use client";
-import TheBoard from "@/app/word-board/TheBoard";
-import LightButton from "../../components/buttons/LightButton";
+import TheBoard from "@/app/(features)/word-board/TheBoard";
+import LightButton from "../../../components/buttons/LightButton";
 import { KeyboardEvent, useRef, useState } from "react";
 import { Word } from "@/lib/interfaces";
 import {
diff --git a/src/app/folders/FoldersClient.tsx b/src/app/folders/FoldersClient.tsx
index a342594..0c5e9ba 100644
--- a/src/app/folders/FoldersClient.tsx
+++ b/src/app/folders/FoldersClient.tsx
@@ -1,6 +1,11 @@
 "use client";
 
-import { ChevronRight, Folder, FolderPlus, Trash2 } from "lucide-react";
+import {
+  ChevronRight,
+  Folder,
+  FolderPlus,
+  Trash2,
+} from "lucide-react";
 import { useEffect, useState } from "react";
 import { Center } from "@/components/Center";
 import { useRouter } from "next/navigation";
diff --git a/src/app/folders/[folder_id]/InFolder.tsx b/src/app/folders/[folder_id]/InFolder.tsx
index cf3eb53..4149234 100644
--- a/src/app/folders/[folder_id]/InFolder.tsx
+++ b/src/app/folders/[folder_id]/InFolder.tsx
@@ -3,7 +3,7 @@
 import { ArrowLeft, Edit, Plus, Trash2, X } from "lucide-react";
 import { Center } from "@/components/Center";
 import { useEffect, useState } from "react";
-import { useRouter } from "next/navigation";
+import { redirect, useRouter } from "next/navigation";
 import Container from "@/components/cards/Container";
 import {
   createTextPair,
@@ -15,6 +15,7 @@ import AddTextPairModal from "./AddTextPairModal";
 import TextPairCard from "./TextPairCard";
 import UpdateTextPairModal from "./UpdateTextPairModal";
 import { text_pairUpdateInput } from "../../../../generated/prisma/models";
+import LightButton from "@/components/buttons/LightButton";
 
 export interface TextPair {
   id: number;
@@ -77,14 +78,26 @@ export default function InFolder({ folderId }: { folderId: number }) {
               </p>
             </div>
 
-            <button
-              className="p-2 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
-              onClick={() => {
-                setAddModal(true);
-              }}
-            >
-              <Plus size={18} className="text-gray-600 hover:cursor-pointer" />
-            </button>
+            <div className="flex items-center gap-2">
+              <LightButton
+                onClick={() => {
+                  redirect(`/memorize?folder_id=${folderId}`);
+                }}
+              >
+                Memorize
+              </LightButton>
+              <button
+                className="p-2 border border-gray-200 rounded-lg hover:bg-gray-50 transition-colors"
+                onClick={() => {
+                  setAddModal(true);
+                }}
+              >
+                <Plus
+                  size={18}
+                  className="text-gray-600 hover:cursor-pointer"
+                />
+              </button>
+            </div>
           </div>
         </div>
 
diff --git a/src/app/folders/[folder_id]/page.tsx b/src/app/folders/[folder_id]/page.tsx
index 2089ccd..f5581c0 100644
--- a/src/app/folders/[folder_id]/page.tsx
+++ b/src/app/folders/[folder_id]/page.tsx
@@ -13,7 +13,7 @@ export default async function FoldersPage({
   if (!id) {
     redirect("/folders");
   }
-  if (!session?.user?.name) redirect(`/login`);
+  if (!session?.user?.name) redirect(`/login?redirect=/folders/${id}`);
   if ((await getOwnerByFolderId(id)) !== session.user.name) {
     return "you are not the owner of this folder";
   }
diff --git a/src/app/folders/page.tsx b/src/app/folders/page.tsx
index 12bb8f9..ab9ca5d 100644
--- a/src/app/folders/page.tsx
+++ b/src/app/folders/page.tsx
@@ -3,8 +3,6 @@ import { redirect } from "next/navigation";
 import { getServerSession } from "next-auth";
 export default async function FoldersPage() {
   const session = await getServerSession();
-  if (!session?.user?.name) redirect(`/login`);
-  return (
-    <FoldersClient username={session.user.name} />
-  );
+  if (!session?.user?.name) redirect(`/login?redirect=/folders`);
+  return <FoldersClient username={session.user.name} />;
 }
diff --git a/src/app/memorize/Choose.tsx b/src/app/memorize/Choose.tsx
deleted file mode 100644
index 8148aba..0000000
--- a/src/app/memorize/Choose.tsx
+++ /dev/null
@@ -1,67 +0,0 @@
-import LightButton from "@/components/buttons/LightButton";
-import ACard from "@/components/cards/ACard";
-import BCard from "@/components/cards/BCard";
-import { LOCALES } from "@/config/locales";
-import { Dispatch, SetStateAction, useState } from "react";
-import { WordData } from "@/lib/interfaces";
-
-import { useTranslations } from "next-intl";
-
-interface Props {
-  setEditPage: Dispatch<SetStateAction<"choose" | "edit">>;
-  wordData: WordData;
-  setWordData: Dispatch<SetStateAction<WordData>>;
-  localeKey: 0 | 1;
-}
-
-export default function Choose({
-  setEditPage,
-  wordData,
-  setWordData,
-  localeKey,
-}: Props) {
-  const t = useTranslations("memorize.choose");
-  const [chosenLocale, setChosenLocale] = useState<
-    (typeof LOCALES)[number] | null
-  >(null);
-
-  const handleChooseClick = () => {
-    if (chosenLocale) {
-      setWordData({
-        locales: [
-          localeKey === 0 ? chosenLocale : wordData.locales[0],
-          localeKey === 1 ? chosenLocale : wordData.locales[1],
-        ],
-        wordPairs: wordData.wordPairs,
-      });
-      setEditPage("edit");
-    }
-  };
-
-  return (
-    <div className="w-screen flex justify-center items-center">
-      <ACard className="flex flex-col">
-        <div className="overflow-y-auto flex-1 border border-gray-200 rounded-2xl p-2 grid grid-cols-4 md:grid-cols-6 md:gap-2">
-          {LOCALES.map((locale, index) => (
-            <LightButton
-              key={index}
-              className="md:w-26 w-18"
-              selected={locale === chosenLocale}
-              onClick={() => setChosenLocale(locale)}
-            >
-              {locale}
-            </LightButton>
-          ))}
-        </div>
-        <div className="w-full flex items-center justify-center">
-          <BCard className="flex gap-2 justify-center items-center w-fit">
-            <LightButton onClick={handleChooseClick}>{t("choose")}</LightButton>
-            <LightButton onClick={() => setEditPage("edit")}>
-              {t("back")}
-            </LightButton>
-          </BCard>
-        </div>
-      </ACard>
-    </div>
-  );
-}
diff --git a/src/app/memorize/Edit.tsx b/src/app/memorize/Edit.tsx
deleted file mode 100644
index b1a1a06..0000000
--- a/src/app/memorize/Edit.tsx
+++ /dev/null
@@ -1,110 +0,0 @@
-import LightButton from "@/components/buttons/LightButton";
-import ACard from "@/components/cards/ACard";
-import BCard from "@/components/cards/BCard";
-import { ChangeEvent, Dispatch, SetStateAction, useRef, useState } from "react";
-import DarkButton from "@/components/buttons/DarkButton";
-import { WordData } from "@/lib/interfaces";
-import Choose from "./Choose";
-
-import { useTranslations } from "next-intl";
-
-interface Props {
-  setPage: Dispatch<SetStateAction<"start" | "main" | "edit">>;
-  wordData: WordData;
-  setWordData: Dispatch<SetStateAction<WordData>>;
-}
-
-export default function Edit({ setPage, wordData, setWordData }: Props) {
-  const t = useTranslations("memorize.edit");
-  const textareaRef = useRef<HTMLTextAreaElement>(null);
-  const [localeKey, setLocaleKey] = useState<0 | 1>(0);
-  const [editPage, setEditPage] = useState<"choose" | "edit">("edit");
-  const convertIntoWordData = (text: string) => {
-    const t1 = text
-      .replace("，", ",")
-      .split("\n")
-      .map((v) => v.trim())
-      .filter((v) => v.includes(","));
-    const t2 = t1
-      .map((v) => {
-        const [left, right] = v.split(",", 2).map((v) => v.trim());
-        if (left && right) return [left, right] as [string, string];
-        else return null;
-      })
-      .filter((v) => v !== null);
-    const new_data: WordData = {
-      locales: [...wordData.locales],
-      wordPairs: t2,
-    };
-    return new_data;
-  };
-  const convertFromWordData = (wdata: WordData) => {
-    let result = "";
-    for (const pair of wdata.wordPairs) {
-      result += `${pair[0]}, ${pair[1]}\n`;
-    }
-    return result;
-  };
-  let input = convertFromWordData(wordData);
-  const handleSave = () => {
-    const newWordData = convertIntoWordData(input);
-    setWordData(newWordData);
-    if (textareaRef.current)
-      textareaRef.current.value = convertFromWordData(newWordData);
-    if (localStorage) {
-      localStorage.setItem("wordData", JSON.stringify(newWordData));
-    }
-  };
-  const handleChange = (e: ChangeEvent<HTMLTextAreaElement>) => {
-    input = e.target.value;
-  };
-  if (editPage === "edit")
-    return (
-      <div className="w-screen flex justify-center items-center">
-        <ACard className="flex flex-col">
-          <textarea
-            onKeyDown={(e) => {
-              if (e.key === "Enter" && e.ctrlKey) handleSave();
-            }}
-            ref={textareaRef}
-            className="flex-1 text-gray-800 font-mono md:text-2xl border-gray-200 border rounded-2xl w-full resize-none outline-0 p-2"
-            defaultValue={input}
-            onChange={handleChange}
-          ></textarea>
-          <div className="w-full flex items-center justify-center">
-            <BCard className="flex gap-2 justify-center items-center w-fit">
-              <LightButton onClick={() => setPage("main")}>
-                {t("back")}
-              </LightButton>
-              <LightButton onClick={handleSave}>{t("save")}</LightButton>
-              <DarkButton
-                onClick={() => {
-                  setLocaleKey(0);
-                  setEditPage("choose");
-                }}
-              >
-                {t("locale1")}
-              </DarkButton>
-              <DarkButton
-                onClick={() => {
-                  setLocaleKey(1);
-                  setEditPage("choose");
-                }}
-              >
-                {t("locale2")}
-              </DarkButton>
-            </BCard>
-          </div>
-        </ACard>
-      </div>
-    );
-  if (editPage === "choose")
-    return (
-      <Choose
-        wordData={wordData}
-        setEditPage={setEditPage}
-        setWordData={setWordData}
-        localeKey={localeKey}
-      ></Choose>
-    );
-}
diff --git a/src/app/memorize/Main.tsx b/src/app/memorize/Main.tsx
deleted file mode 100644
index 0a7aeee..0000000
--- a/src/app/memorize/Main.tsx
+++ /dev/null
@@ -1,73 +0,0 @@
-import LightButton from "@/components/buttons/LightButton";
-import ACard from "@/components/cards/ACard";
-import BCard from "@/components/cards/BCard";
-import { WordData, WordDataSchema } from "@/lib/interfaces";
-import { Dispatch, SetStateAction } from "react";
-import useFileUpload from "@/hooks/useFileUpload";
-import { useTranslations } from "next-intl";
-
-interface Props {
-  wordData: WordData;
-  setWordData: Dispatch<SetStateAction<WordData>>;
-  setPage: Dispatch<SetStateAction<"start" | "main" | "edit">>;
-}
-
-export default function Main({
-  wordData,
-  setWordData,
-  setPage: setPage,
-}: Props) {
-  const t = useTranslations("memorize.main");
-  const { upload, inputRef } = useFileUpload(async (file) => {
-    try {
-      const obj = JSON.parse(await file.text());
-      const newWordData = WordDataSchema.parse(obj);
-      setWordData(newWordData);
-    } catch (error) {
-      console.error(error);
-    }
-  });
-  const handleLoad = async () => {
-    upload("application/json");
-  };
-  const handleSave = () => {
-    const blob = new Blob([JSON.stringify(wordData)], {
-      type: "application/json",
-    });
-    const url = URL.createObjectURL(blob);
-    const a = document.createElement("a");
-    a.href = url;
-    a.download = "word_data.json";
-    a.click();
-    URL.revokeObjectURL(url);
-  };
-  return (
-    <div className="w-screen flex justify-center items-center">
-      <ACard className="flex-col flex">
-        <h1 className="text-center font-extrabold text-4xl text-gray-800 m-2 mb-4">
-          {t("title")}
-        </h1>
-        <div className="flex-1 font-serif text-2xl w-full h-full text-gray-800">
-          <BCard>
-            <p>{t("locale1", { locale: wordData.locales[0] })}</p>
-            <p>{t("locale2", { locale: wordData.locales[1] })}</p>
-            <p>{t("total", { total: wordData.wordPairs.length })}</p>
-          </BCard>
-        </div>
-        <div className="w-full flex items-center justify-center">
-          <BCard className="flex gap-2 justify-center items-center w-fit">
-            <LightButton onClick={() => setPage("start")}>
-              {t("start")}
-            </LightButton>
-            <LightButton onClick={handleLoad}>{t("import")}</LightButton>
-            <LightButton onClick={handleSave}>{t("export")}</LightButton>
-            <LightButton onClick={() => setPage("edit")}>
-              {t("edit")}
-            </LightButton>
-          </BCard>
-        </div>
-      </ACard>
-      <input type="file" hidden ref={inputRef}></input>
-    </div>
-  );
-}
diff --git a/src/app/memorize/Start.tsx b/src/app/memorize/Start.tsx
deleted file mode 100644
index 5353988..0000000
--- a/src/app/memorize/Start.tsx
+++ /dev/null
@@ -1,100 +0,0 @@
-import LightButton from "@/components/buttons/LightButton";
-import { WordData } from "@/lib/interfaces";
-import { Dispatch, SetStateAction, useState } from "react";
-import { useAudioPlayer } from "@/hooks/useAudioPlayer";
-import { getTTSAudioUrl } from "@/lib/utils";
-import { VOICES } from "@/config/locales";
-
-import { useTranslations } from "next-intl";
-
-interface WordBoardProps {
-  children: React.ReactNode;
-}
-function WordBoard({ children }: WordBoardProps) {
-  return (
-    <div className="text-nowrap w-full h-36 border border-white rounded flex justify-center items-center text-4xl md:text-6xl font-serif overflow-x-auto">
-      {children}
-    </div>
-  );
-}
-
-interface Props {
-  wordData: WordData;
-  setPage: Dispatch<SetStateAction<"start" | "main" | "edit">>;
-}
-export default function Start({ wordData, setPage }: Props) {
-  const t = useTranslations("memorize.start");
-  const [display, setDisplay] = useState<"ask" | "show">("ask");
-  const [wordPair, setWordPair] = useState(
-    wordData.wordPairs[Math.floor(Math.random() * wordData.wordPairs.length)],
-  );
-  const [reverse, setReverse] = useState(false);
-  const [dictation, setDictation] = useState(false);
-  const { load, play } = useAudioPlayer();
-  const show = () => {
-    setDisplay("show");
-  };
-  const next = async () => {
-    setDisplay("ask");
-    const newWordPair =
-      wordData.wordPairs[Math.floor(Math.random() * wordData.wordPairs.length)];
-    setWordPair(newWordPair);
-    if (dictation)
-      await load(
-        await getTTSAudioUrl(
-          newWordPair[reverse ? 1 : 0],
-          VOICES.find((v) => v.locale === wordData.locales[reverse ? 1 : 0])!
-            .short_name,
-        ),
-      ).then(play);
-  };
-  return (
-    <div className="w-screen flex justify-center items-center">
-      <div className="flex-col flex items-center h-96">
-        <div className="flex-1 w-[95dvw] md:w-fit p-4 gap-4 flex flex-col overflow-x-auto">
-          {dictation ? (
-            <>
-              {display === "show" && (
-                <>
-                  <WordBoard>{wordPair[reverse ? 1 : 0]}</WordBoard>
-                  <WordBoard>{wordPair[reverse ? 0 : 1]}</WordBoard>
-                </>
-              )}
-            </>
-          ) : (
-            <>
-              <WordBoard>{wordPair[reverse ? 1 : 0]}</WordBoard>
-              {display === "show" && (
-                <WordBoard>{wordPair[reverse ? 0 : 1]}</WordBoard>
-              )}
-            </>
-          )}
-        </div>
-        <div className="w-full flex items-center justify-center">
-          <div className="flex gap-2 justify-center items-center w-fit font-mono flex-wrap">
-            {display === "ask" ? (
-              <LightButton onClick={show}>{t("show")}</LightButton>
-            ) : (
-              <LightButton onClick={next}>{t("next")}</LightButton>
-            )}
-            <LightButton
-              onClick={() => setReverse(!reverse)}
-              selected={reverse}
-            >
-              {t("reverse")}
-            </LightButton>
-            <LightButton
-              onClick={() => setDictation(!dictation)}
-              selected={dictation}
-            >
-              {t("dictation")}
-            </LightButton>
-            <LightButton onClick={() => setPage("main")}>
-              {t("back")}
-            </LightButton>
-          </div>
-        </div>
-      </div>
-    </div>
-  );
-}
diff --git a/src/app/memorize/page.tsx b/src/app/memorize/page.tsx
deleted file mode 100644
index b131915..0000000
--- a/src/app/memorize/page.tsx
+++ /dev/null
@@ -1,49 +0,0 @@
-"use client";
-
-import { useState } from "react";
-import Main from "./Main";
-import Edit from "./Edit";
-import Start from "./Start";
-import { WordData, WordDataSchema } from "@/lib/interfaces";
-
-const getLocalWordData = (): WordData => {
-  const data = localStorage.getItem("wordData");
-  if (!data) return {
-    locales: ['en-US', 'zh-CN'],
-    wordPairs: []
-  };
-  try {
-    const parsedData = JSON.parse(data);
-    const parsedData2 = WordDataSchema.parse(parsedData);
-    return parsedData2;
-  } catch (error) {
-    console.error(error);
-    return {
-      locales: ['en-US', 'zh-CN'],
-      wordPairs: []
-    };
-  }
-}
-
-export default function MemorizePage() {
-  const [page, setPage] = useState<"start" | "main" | "edit">("main");
-  const [wordData, setWordData] = useState<WordData>(getLocalWordData());
-  if (page === "main")
-    return (
-      <Main
-        wordData={wordData}
-        setWordData={setWordData}
-        setPage={setPage}
-      ></Main>
-    );
-  if (page === "edit")
-    return (
-      <Edit
-        setPage={setPage}
-        wordData={wordData}
-        setWordData={setWordData}
-      ></Edit>
-    );
-  if (page === "start")
-    return <Start setPage={setPage} wordData={wordData}></Start>;
-}
diff --git a/src/components/Navbar.tsx b/src/components/Navbar.tsx
index ef38600..d946aac 100644
--- a/src/components/Navbar.tsx
+++ b/src/components/Navbar.tsx
@@ -8,20 +8,8 @@ import IMAGES from "@/config/images";
 import { useState } from "react";
 import LightButton from "./buttons/LightButton";
 import { useSession } from "next-auth/react";
+import { Folder, Home } from "lucide-react";
 
-function MyLink({
-  href,
-  children,
-}: {
-  href: string;
-  children?: React.ReactNode;
-}) {
-  return (
-    <Link className="font-bold" href={href}>
-      {children}
-    </Link>
-  );
-}
 export function Navbar() {
   const t = useTranslations("navbar");
   const [showLanguageMenu, setShowLanguageMenu] = useState(false);
@@ -35,20 +23,24 @@ export function Navbar() {
   const session = useSession();
   return (
     <div className="flex justify-between items-center w-full h-16 px-8 bg-[#35786f] text-white">
-      <div className="flex gap-4 text-xl justify-center items-center">
-        <Link href={"/"} className="text-xl flex border-b">
+      <Link href={"/"} className="text-xl border-b hidden md:block">
+        {t("title")}
+      </Link>
+      <Link className="block md:hidden" href={"/"}>
+        <Home />
+      </Link>
+      <div className="flex gap-4 text-xl justify-center items-center flex-wrap">
+        <Link
+          className="md:hidden block"
+          href="https://github.com/GoddoNebianU/learn-languages"
+        >
           <Image
-            src={"/favicon.ico"}
-            alt="logo"
-            width="32"
-            height="32"
-            className="rounded-4xl"
-          ></Image>
-          <span className="font-bold text-pink-200">{t("title")}</span>
+            src={IMAGES.github_mark_white}
+            alt="GitHub"
+            width={24}
+            height={24}
+          />
         </Link>
-        <MyLink href="/folders">{t("folders")}</MyLink>
-      </div>
-      <div className="flex gap-4 text-xl justify-center items-center">
         <div className="relative">
           {showLanguageMenu && (
             <div>
@@ -75,17 +67,26 @@ export function Navbar() {
             onClick={handleLanguageClick}
           ></IconClick>
         </div>
+        <Link href="/folders" className="md:block hidden">
+          {t("folders")}
+        </Link>
+        <Link href="/folders" className="md:hidden block">
+          <Folder />
+        </Link>
         {session?.status === "authenticated" ? (
           <div className="flex gap-2">
-            <MyLink href="/profile">{t("profile")}</MyLink>
+            <Link href="/profile">{t("profile")}</Link>
           </div>
         ) : (
-          <MyLink href="/login">{t("login")}</MyLink>
+          <Link href="/login">{t("login")}</Link>
         )}
-        <MyLink href="/changelog.txt">{t("about")}</MyLink>
-        <MyLink href="https://github.com/GoddoNebianU/learn-languages">
+        <Link href="/changelog.txt">{t("about")}</Link>
+        <Link
+          className="hidden md:block"
+          href="https://github.com/GoddoNebianU/learn-languages"
+        >
           {t("sourceCode")}
-        </MyLink>
+        </Link>
       </div>
     </div>
   );
diff --git a/src/config/images.ts b/src/config/images.ts
index 81f9d3b..39e020d 100644
--- a/src/config/images.ts
+++ b/src/config/images.ts
@@ -18,6 +18,7 @@ const IMAGES = {
   language_black: "/images/language_24dp_1F1F1F_FILL0_wght400_GRAD0_opsz24.svg",
   language_white: "/images/language_24dp_FFFFFF_FILL0_wght400_GRAD0_opsz24.svg",
   github_mark: "/images/github-mark/github-mark.svg",
+  github_mark_white: "/images/github-mark/github-mark-white.svg",
 };
 
 export default IMAGES;
diff --git a/src/lib/services/folderService.ts b/src/lib/services/folderService.ts
index 007343e..c053126 100644
--- a/src/lib/services/folderService.ts
+++ b/src/lib/services/folderService.ts
@@ -1,6 +1,10 @@
 "use server";
 
-import { folderCreateInput, folderUpdateInput } from "../../../generated/prisma/models";
+import { folder } from "../../../generated/prisma/client";
+import {
+  folderCreateInput,
+  folderUpdateInput,
+} from "../../../generated/prisma/models";
 import prisma from "../db";
 
 export async function getFoldersByOwner(owner: string) {
@@ -12,6 +16,26 @@ export async function getFoldersByOwner(owner: string) {
   return folders;
 }
 
+export async function getFoldersWithTotalPairsByOwner(owner: string) {
+  const folders = await prisma.folder.findMany({
+    where: {
+      owner: owner
+    },
+    include: {
+      text_pair: {
+        select: {
+          id: true
+        }
+      }
+    }
+  });
+
+  return folders.map(folder => ({
+    ...folder,
+    total_pairs: folder.text_pair.length
+  }));
+}
+
 export async function createFolder(folder: folderCreateInput) {
   await prisma.folder.create({
     data: folder,
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index 4359588..7b64a9d 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -123,4 +123,8 @@ export const letsFetch = (
       }
     })
     .finally(onFinally);
-};
\ No newline at end of file
+};
+
+export function isNonNegativeInteger(str: string): boolean {
+  return /^\d+$/.test(str);
+}