diff --git a/.vscode/settings.json b/.vscode/settings.json
index be8156d..ee7b675 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -2,6 +2,6 @@
   "editor.formatOnType": false,
   "editor.formatOnSave": true,
   "editor.codeActionsOnSave": {
-    "source.fixAll.eslint": true
+    "source.fixAll.eslint": "explicit"
   }
 }
diff --git a/src/hooks.ts b/src/hooks.ts
index 69cd7ca..86f7748 100644
--- a/src/hooks.ts
+++ b/src/hooks.ts
@@ -16,8 +16,6 @@ async function onStartup() {
 
   await tldrs.getAsync();
 
-  RegisterFactory.registerPrefs();
-
   RegisterFactory.registerNotifier();
 
   await onMainWindowLoad(window);
@@ -33,8 +31,6 @@ async function onMainWindowLoad(win: Window): Promise<void> {
 
   UIFactory.registerRightClickCollectionMenuItem();
 
-  await UIFactory.registerTLDRItemBoxRow();
-
   onLoad();
 }
 
@@ -127,8 +123,8 @@ function onUpdateItems(items: Zotero.Item[], forceFetch: boolean = false) {
     if (!item.getField("title")) {
       return false;
     }
-    if (!forceFetch) {
-      return tldrs.get()[item.id] === undefined;
+    if (!forceFetch && (item.key in tldrs.get())) {
+      return false;
     }
     return true;
   });
diff --git a/src/modules/Common.ts b/src/modules/Common.ts
index 0473ac4..f19a5b1 100644
--- a/src/modules/Common.ts
+++ b/src/modules/Common.ts
@@ -1,6 +1,5 @@
 import { config } from "../../package.json";
 import { getString } from "../utils/locale";
-import { tldrs, TLDRItemNotFound, TLDRUnrelated } from "./dataStorage";
 
 export class RegisterFactory {
   // 注册zotero的通知
@@ -36,19 +35,6 @@ export class RegisterFactory {
   private static unregisterNotifier(notifierID: string) {
     Zotero.Notifier.unregisterObserver(notifierID);
   }
-
-  // 注册首选项配置
-  static registerPrefs() {
-    // const prefOptions = {
-    //   pluginID: config.addonID,
-    //   src: rootURI + "chrome/content/preferences.xhtml",
-    //   label: getString("prefs.title"),
-    //   image: `chrome://${config.addonRef}/content/icons/favicon.png`,
-    //   extraDTD: [`chrome://${config.addonRef}/locale/overlay.dtd`],
-    //   defaultXUL: true,
-    // };
-    // ztoolkit.PreferencePane.register(prefOptions);
-  }
 }
 
 export class UIFactory {
@@ -83,39 +69,4 @@ export class UIFactory {
       icon: menuIcon,
     });
   }
-
-  // tldr行
-  static async registerTLDRItemBoxRow() {
-    await ztoolkit.ItemBox.register(
-      "TLDR",
-      getString("itembox-tldrlabel"),
-      (field, unformatted, includeBaseMapped, item, original) => {
-        const tldrInfo = tldrs.get()[item.id];
-        if (tldrInfo === TLDRUnrelated) {
-          return getString(TLDRUnrelated);
-        } else if (tldrInfo === TLDRItemNotFound) {
-          return getString(TLDRItemNotFound);
-        } else if (tldrInfo) {
-          return tldrInfo;
-        } else {
-          return "";
-        }
-      },
-      {
-        editable: true,
-        setFieldHook: (field, value, loadIn, item, original) => {
-          (async () => {
-            await tldrs.modify((data: any) => {
-              data[item.id] = value;
-              return data;
-            });
-            ztoolkit.ItemBox.refresh();
-          })();
-          return true;
-        },
-        index: 2,
-        multiline: true,
-      },
-    );
-  }
 }
diff --git a/src/modules/dataStorage.ts b/src/modules/dataStorage.ts
index c213b9b..46aeb13 100644
--- a/src/modules/dataStorage.ts
+++ b/src/modules/dataStorage.ts
@@ -119,6 +119,4 @@ export class DataStorage {
   }
 }
 
-export const TLDRUnrelated = "tldr-unrelated"; // semantic scholar 找到了该item，但是该item没有tldr
-export const TLDRItemNotFound = "tldr-itemnotfound"; // semantic scholar 找不到该item
-export const tldrs = DataStorage.instance<string | number, string>("TLDR.json");
+export const tldrs = DataStorage.instance<string, string | false>("fetchedItems.json");
diff --git a/src/modules/tldrFetcher.ts b/src/modules/tldrFetcher.ts
index fac592d..9c035e9 100644
--- a/src/modules/tldrFetcher.ts
+++ b/src/modules/tldrFetcher.ts
@@ -1,4 +1,4 @@
-import { tldrs, TLDRUnrelated, TLDRItemNotFound } from "./dataStorage";
+import { tldrs } from "./dataStorage";
 
 type SemanticScholarItemInfo = {
   title?: string;
@@ -23,6 +23,7 @@ export class TLDRFetcher {
     if (!this.title || this.title.length <= 0) {
       return false;
     }
+    const noteKey = (await tldrs.getAsync())[this.zoteroItem.key];
     try {
       const infos = await this.fetchRelevanceItemInfos(this.title);
       for (const info of infos) {
@@ -36,23 +37,30 @@ export class TLDRFetcher {
         ) {
           match = true;
         }
-        if (match) {
-          const result = info.tldr ?? TLDRUnrelated;
-          tldrs.modify((data: any) => {
-            data[this.zoteroItem.id] = result;
+        if (match && info.tldr) {
+          let note = new Zotero.Item('note');
+          if (noteKey) {
+            const obj = Zotero.Items.getByLibraryAndKey(this.zoteroItem.libraryID, noteKey);
+            if (obj && obj instanceof Zotero.Item && this.zoteroItem.getNotes().includes(obj.id)) {
+              note = obj;
+            }
+          }
+          note.setNote(`<p>TL;DR</p>\n<p>${info.tldr}</p>`)
+          note.parentID = this.zoteroItem.id;
+          await note.saveTx();
+          await tldrs.modify((data: any) => {
+            data[this.zoteroItem.key] = note.key;
             return data;
           });
-          return true;
+          return true
         }
       }
-      tldrs.modify((data: any) => {
-        data[this.zoteroItem.id] = TLDRItemNotFound;
+      await tldrs.modify((data: any) => {
+        data[this.zoteroItem.key] = false;
         return data;
       });
-      return false;
     } catch (error) {
       Zotero.log(`post semantic scholar request error: ${error}`);
-      return false;
     }
   }