diff --git a/SUMMARY.md b/SUMMARY.md
index 6fe7f4c..2afd9c3 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -19,8 +19,8 @@
    * [2.7. Go实现Python模块(TODO)](ch2-cgo/ch2-07-py-module.md)
    * [2.8. SWIG(TODO)](ch2-cgo/ch2-08-swig.md)
    * [2.9. 补充说明(TODO)](ch2-cgo/ch2-09-faq.md)
-* [第三章 Go汇编语言](ch3-asm/readme.md)
-* [第四章 Go和脚本语言](ch4-xlang/readme.md)
+* [第三章 汇编语言](ch3-asm/readme.md)
+* [第四章 移动平台](ch4-mobile/readme.md)
 * [第六章 Go和Web](ch6-web/readme.md)
    * [6.1. Web开发简介](ch6-web/ch6-01-introduction.md)
    * [6.2. Router请求路由](ch6-web/ch6-02-router.md)
diff --git a/ch2-cgo/ch2-06-static-shared-lib.md b/ch2-cgo/ch2-06-static-shared-lib.md
index 0b8d71e..2e3be2d 100644
--- a/ch2-cgo/ch2-06-static-shared-lib.md
+++ b/ch2-cgo/ch2-06-static-shared-lib.md
@@ -1,4 +1,4 @@
-# x.y. 静态库和动态库
+# 2.6. 静态库和动态库
 
 <!--
 使用c静态库
diff --git a/ch4-mobile/readme.md b/ch4-mobile/readme.md
new file mode 100644
index 0000000..e874579
--- /dev/null
+++ b/ch4-mobile/readme.md
@@ -0,0 +1,3 @@
+# 第四章 移动平台
+
+TODO
diff --git a/ch4-xlang/readme.md b/ch4-xlang/readme.md
deleted file mode 100644
index 08ff909..0000000
--- a/ch4-xlang/readme.md
+++ /dev/null
@@ -1,3 +0,0 @@
-# 第四章 Go和脚本语言
-
-TODO
diff --git a/chx-unknown/readme.md b/chx-unknown/readme.md
new file mode 100644
index 0000000..e6bd1ca
--- /dev/null
+++ b/chx-unknown/readme.md
@@ -0,0 +1 @@
+# 未知章节