diff --git a/aio/content/guide/ngmodules.md b/aio/content/guide/ngmodules.md
index 3ac115a7cf..c80722a4d2 100644
--- a/aio/content/guide/ngmodules.md
+++ b/aio/content/guide/ngmodules.md
@@ -57,7 +57,7 @@ Many third-party libraries are available as NgModules such as
 <a href="https://github.com/angular/angularfire2">AngularFire2</a>.
 
 Angular 自己的库都是 NgModule，比如 `FormsModule`、`HttpClientModule` 和 `RouterModule`。
-很多第三方库也是 NgModule，比如 <a href="https://material.angular.io/">Material Design</a>、
+很多第三方库也是 NgModule，比如 <a href="https://material.angular.cn/">Material Design</a>、
 <a href="http://ionicframework.com/">Ionic</a> 和
 <a href="https://github.com/angular/angularfire2">AngularFire2</a>。
 
diff --git a/aio/content/guide/quickstart.md b/aio/content/guide/quickstart.md
index dd122fa33d..22ef0ad4d6 100644
--- a/aio/content/guide/quickstart.md
+++ b/aio/content/guide/quickstart.md
@@ -96,7 +96,7 @@ For more information, see the [Angular CLI documentation.](https://github.com/an
 Angular Material provides schematics for typical app layouts. 
 See the [Angular Material documentation](https://material.angular.io/guides "Angular Material documentation") for details.
 
-比如 Angular Material 就为一些典型布局提供了图纸。参见 [Angular Material 文档](https://material.angular.io/guides "Angular Material documentation")。
+比如 Angular Material 就为一些典型布局提供了图纸。参见 [Angular Material 文档](https://material.angular.cn/guides "Angular Material documentation")。
 
 </div>
 
diff --git a/aio/content/guide/styleguide.md b/aio/content/guide/styleguide.md
index 72a15cbb44..df40e02217 100644
--- a/aio/content/guide/styleguide.md
+++ b/aio/content/guide/styleguide.md
@@ -3643,7 +3643,7 @@ Developers place components on the page as they would native HTML elements and w
 There are a few cases where you give a component an attribute, such as when you want to augment a built-in element. For example, [Material Design](https://material.angular.io/components/button/overview) uses this technique with `<button mat-button>`. However, you wouldn't use this technique on a custom element.
 
 少数情况下，你要为组件使用属性选择器，比如你要加强某个内置元素时。
-比如，[Material Design 组件库](https://material.angular.io/components/button/overview)就会对 `<button mat-button>` 使用这项技术。不过，你不应该在自定义组件上使用这项技术。
+比如，[Material Design 组件库](https://material.angular.cn/components/button/overview)就会对 `<button mat-button>` 使用这项技术。不过，你不应该在自定义组件上使用这项技术。
 
 </div>
 
diff --git a/aio/content/tutorial/toh-pt0.md b/aio/content/tutorial/toh-pt0.md
index 3d58627136..f03ca80fc8 100644
--- a/aio/content/tutorial/toh-pt0.md
+++ b/aio/content/tutorial/toh-pt0.md
@@ -42,7 +42,7 @@ For more information, see the [Angular CLI documentation.](https://github.com/an
 Angular Material provides schematics for typical app layouts. 
 See the [Angular Material documentation](https://material.angular.io/guides "Angular Material documentation") for details.
 
-比如 Angular Material 就为一些典型布局提供了图纸。参见 [Angular Material 文档](https://material.angular.io/guides "Angular Material documentation")。
+比如 Angular Material 就为一些典型布局提供了图纸。参见 [Angular Material 文档](https://material.angular.cn/guides "Angular Material documentation")。
 
 </div>