diff --git a/README.md b/README.md
index ce7d2c2..5e0ad87 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,7 @@ make it easier to integrate PDF viewer to your project.
 
 # Online Demos
 
-See https://priestch.github.io/document-viewer/demos/#/custom-toolbar
+See https://priestch.github.io/document-viewer/demos/
 
 # Docs
 
diff --git a/docs/.vitepress/config.js b/docs/.vitepress/config.js
index 1e3b405..2dbc4bc 100644
--- a/docs/.vitepress/config.js
+++ b/docs/.vitepress/config.js
@@ -37,17 +37,16 @@ const config = {
           { text: "Npm Package", link: "https://www.npmjs.com/package/@document-kits/viewer" },
           { text: "Releases", link: "https://github.com/Priestch/document-viewer/tags" },
           { text: "Useful Resources", link: "/resources" },
-          {
-            text: "Official FAQ",
-            link: "https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions",
-          },
           {
             text: "About PDF.js",
             items: [
               { text: "Learned Knowledge", link: "/learned-knowledge/" },
               { text: "Architecture", link: "/architecture" },
               { text: "Common Pitfalls", link: "/pitfalls" },
-              { text: "Threads Communication", link: "/communication" },
+              {
+                text: "Official FAQ",
+                link: "https://github.com/mozilla/pdf.js/wiki/Frequently-Asked-Questions",
+              },
             ],
           },
         ],
diff --git a/docs/architecture.md b/docs/architecture.md
index e5fdd6c..85ea61d 100644
--- a/docs/architecture.md
+++ b/docs/architecture.md
@@ -8,7 +8,7 @@ head:
 
 # PDF.js Architecture
 
-![Overview of the PDF.js Architecture](https://hacks.mozilla.org/files/2021/09/pdfjs_architecture.png)
+![Overview of the PDF.js Architecture](./assets/pdfjs_architecture.png)
 
 [Read more](https://hacks.mozilla.org/2021/10/implementing-form-filling-and-accessibility-in-the-firefox-pdf-viewer/)
 
diff --git a/docs/assets/pdfjs_architecture.png b/docs/assets/pdfjs_architecture.png
new file mode 100644
index 0000000..17ac2aa
Binary files /dev/null and b/docs/assets/pdfjs_architecture.png differ
diff --git a/docs/blog/3-ways-to-display-pdf-in-html.md b/docs/blog/3-ways-to-display-pdf-in-html.md
index 4e129ba..653556b 100644
--- a/docs/blog/3-ways-to-display-pdf-in-html.md
+++ b/docs/blog/3-ways-to-display-pdf-in-html.md
@@ -4,7 +4,7 @@ description: Learn how to display PDF files in your HTML app with three ways, in
 head:
   - - link
     - rel: canonical
-      href: https://priestch.github.io/document-viewer/docs/learned-knowledge/
+      href: https://priestch.github.io/document-viewer/docs/blog/3-ways-to-display-pdf-in-html.html
 ---
 
 # Three Ways to display PDF file in HTML
diff --git a/docs/blog/communication-between-the-main-and-worker-thread.md b/docs/blog/communication-between-the-main-and-worker-thread.md
new file mode 100644
index 0000000..f47ad40
--- /dev/null
+++ b/docs/blog/communication-between-the-main-and-worker-thread.md
@@ -0,0 +1,11 @@
+---
+title: Communication between Main and Worker Threads
+head:
+  - - link
+    - rel: canonical
+      href: https://priestch.github.io/document-viewer/docs/blog/communication-between-the-main-and-worker-thread.html
+---
+
+# Communication between Main and Worker Threads
+
+![between main and worker thread](../assets/communication.svg)
diff --git a/docs/blog/index.md b/docs/blog/index.md
index ceaecad..e0c0294 100644
--- a/docs/blog/index.md
+++ b/docs/blog/index.md
@@ -1,3 +1,4 @@
 # Blogs
 
 - [Three ways to Display PDF in HTML](/blog/3-ways-to-display-pdf-in-html)
+- [Communication between the main and worker thread](/blog/communication-between-the-main-and-worker-thread)
diff --git a/docs/communication.md b/docs/communication.md
deleted file mode 100644
index bc43929..0000000
--- a/docs/communication.md
+++ /dev/null
@@ -1,11 +0,0 @@
----
-title: The Communication between Main and Worker Threads
-head:
-  - - link
-    - rel: canonical
-      href: https://priestch.github.io/document-viewer/docs/communication.html
----
-
-# Main and worker thread communication
-
-![between main and worker thread](./assets/communication.svg)