diff --git a/ui/src/components/nodes/Code.tsx b/ui/src/components/nodes/Code.tsx
index 8aaa59ce..b321200d 100644
--- a/ui/src/components/nodes/Code.tsx
+++ b/ui/src/components/nodes/Code.tsx
@@ -23,7 +23,6 @@ import ReactFlow, {
   NodeProps,
   useStore as useReactFlowStore,
 } from "reactflow";
-import "reactflow/dist/style.css";
 
 import Box from "@mui/material/Box";
 import InputBase from "@mui/material/InputBase";
diff --git a/ui/src/components/nodes/Rich.tsx b/ui/src/components/nodes/Rich.tsx
index a9e64299..ea5c91c2 100644
--- a/ui/src/components/nodes/Rich.tsx
+++ b/ui/src/components/nodes/Rich.tsx
@@ -5,6 +5,7 @@ import {
   useContext,
   useEffect,
   memo,
+  useMemo,
 } from "react";
 import * as React from "react";
 
@@ -30,7 +31,6 @@ import ReactFlow, {
   Node,
   useStore as useReactFlowStore,
 } from "reactflow";
-import "reactflow/dist/style.css";
 import Ansi from "ansi-to-react";
 
 import Box from "@mui/material/Box";
@@ -114,7 +114,6 @@ import { markInputRule } from "@remirror/core-utils";
 import { TableExtension } from "@remirror/extension-react-tables";
 import { GenIcon, IconBase } from "@remirror/react-components";
 import "remirror/styles/all.css";
-import "./remirror-size.css";
 import { styled } from "@mui/material";
 
 import { MyYjsExtension } from "./extensions/YjsRemirror";
@@ -128,11 +127,15 @@ import {
   TaskListExtension,
 } from "./extensions/list";
 
+import { CodePodSyncExtension } from "./extensions/codepodSync";
+
 import { LinkExtension, LinkToolbar } from "./extensions/link";
 
 import { NewPodButtons, level2fontsize } from "./utils";
 import { RepoContext } from "../../lib/store";
 
+import "./remirror-size.css";
+
 /**
  * This is the toolbar when user select some text. It allows user to change the
  * markups of the text, e.g. bold, italic, underline, highlight, etc.
@@ -303,6 +306,11 @@ const MyEditor = ({
         autoLinkAllowedTLDs: ["dev", ...TOP_50_TLDS],
       }),
       new UnderlineExtension(),
+      new CodePodSyncExtension({
+        id: id,
+        setPodContent: setPodContent,
+        setPodRichContent: setPodRichContent,
+      }),
     ],
     onError: ({ json, invalidContent, transformers }) => {
       // Automatically remove all invalid nodes and marks.
@@ -329,8 +337,6 @@ const MyEditor = ({
     stringHandler: "markdown",
   });
 
-  let index_onChange = 0;
-
   return (
     <Box
       className="remirror-theme"
@@ -362,32 +368,18 @@ const MyEditor = ({
         <MyStyledWrapper>
           <Remirror
             manager={manager}
-            // initialContent={state}
-            state={state}
+            // Must set initialContent, otherwise the Reactflow will fire two
+            // dimension change events at the beginning. This should be caused
+            // by initialContent being empty, then the actual content. Setting
+            // it to the actual content at the beginning will prevent this.
+            initialContent={state}
+            // Should not set state and onChange (the controlled Remirror editor
+            // [1]), otherwise Chinsee (or CJK) input methods will not be
+            // supported [2].
+            // - [1] https://remirror.io/docs/controlled-editor
+            // - [2] demo that Chinese input method is not working:
+            //   https://remirror.vercel.app/?path=/story/editors-controlled--editable
             editable={!isGuest}
-            // FIXME: onFocus is not working
-            onChange={(parameter) => {
-              let nextState = parameter.state;
-              setState(nextState);
-              // TODO sync with DB and yjs
-              if (parameter.tr?.docChanged) {
-                setPodRichContent({
-                  id,
-                  richContent: parameter.helpers.getMarkdown(),
-                });
-                index_onChange += 1;
-                if (index_onChange == 1) {
-                  if (
-                    JSON.stringify(pod.content) ===
-                    JSON.stringify(nextState.doc.toJSON())
-                  ) {
-                    // This is the first onChange trigger, and the content is the same. Skip it.
-                    return;
-                  }
-                }
-                setPodContent({ id, content: nextState.doc.toJSON() });
-              }
-            }}
           >
             {/* <WysiwygToolbar /> */}
             <EditorComponent />
diff --git a/ui/src/components/nodes/Scope.tsx b/ui/src/components/nodes/Scope.tsx
index fa8ca5b1..71a2538c 100644
--- a/ui/src/components/nodes/Scope.tsx
+++ b/ui/src/components/nodes/Scope.tsx
@@ -23,7 +23,6 @@ import ReactFlow, {
   NodeProps,
   useStore as useReactFlowStore,
 } from "reactflow";
-import "reactflow/dist/style.css";
 
 import Box from "@mui/material/Box";
 import InputBase from "@mui/material/InputBase";
diff --git a/ui/src/components/nodes/extensions/codepodSync.ts b/ui/src/components/nodes/extensions/codepodSync.ts
new file mode 100644
index 00000000..7df6678d
--- /dev/null
+++ b/ui/src/components/nodes/extensions/codepodSync.ts
@@ -0,0 +1,53 @@
+import TurndownService from "turndown";
+
+import { PlainExtension, StateUpdateLifecycleProps, extension } from "remirror";
+
+interface CodePodSyncOptions {
+  // Options are `Dynamic` by default.
+  id: string;
+  setPodContent: any;
+  setPodRichContent: any;
+}
+
+@extension<CodePodSyncOptions>({
+  defaultOptions: {
+    id: "defaultId",
+    setPodContent: () => {},
+    setPodRichContent: () => {},
+  },
+  staticKeys: [],
+  handlerKeys: [],
+  customHandlerKeys: [],
+})
+/**
+ * This extension is used to sync the content of the editor with the pod.
+ */
+export class CodePodSyncExtension extends PlainExtension<CodePodSyncOptions> {
+  firstUpdate = true;
+  turndownService = new TurndownService();
+  get name(): string {
+    return "codepod-sync";
+  }
+  onStateUpdate({ state, tr }: StateUpdateLifecycleProps) {
+    if (tr?.docChanged) {
+      this.options.setPodContent(
+        {
+          id: this.options.id,
+          content: state.doc.toJSON(),
+        },
+        // The first onChange event is triggered wehn the content is the same.
+        // Skip it.
+        this.firstUpdate
+      );
+      this.firstUpdate = false;
+    }
+
+    var markdown = this.turndownService.turndown(
+      this.store.helpers.getHTML(state)
+    );
+    this.options.setPodRichContent({
+      id: this.options.id,
+      richContent: markdown,
+    });
+  }
+}
diff --git a/ui/src/lib/store/podSlice.tsx b/ui/src/lib/store/podSlice.tsx
index c9173629..3610eb34 100644
--- a/ui/src/lib/store/podSlice.tsx
+++ b/ui/src/lib/store/podSlice.tsx
@@ -33,7 +33,12 @@ export interface PodSlice {
     dirty?: boolean
   ) => void;
   setPodName: ({ id, name }: { id: string; name: string }) => void;
-  setPodContent: ({ id, content }: { id: string; content: string }) => void;
+  setPodContent: (
+    { id, content }: { id: string; content: string },
+    // Whether to perform additional verification of whether content ==
+    // pod.content before setting the dirty flag..
+    verify?: boolean
+  ) => void;
   setPodRichContent: ({
     id,
     richContent,
@@ -87,10 +92,15 @@ export const createPodSlice: StateCreator<MyState, [], [], PodSlice> = (
       // @ts-ignore
       "setPodName"
     ),
-  setPodContent: ({ id, content }) =>
+  setPodContent: ({ id, content }, verify = false) =>
     set(
       produce((state) => {
         let pod = state.pods[id];
+        if (verify) {
+          if (JSON.stringify(pod.content) === JSON.stringify(content)) {
+            return;
+          }
+        }
         pod.content = content;
         pod.dirty = true;
       }),