diff --git a/SUMMARY.md b/SUMMARY.md
index 4602eac..16ca044 100644
--- a/SUMMARY.md
+++ b/SUMMARY.md
@@ -1,17 +1,18 @@
 # Summary
 
 * [Introduction](README.md)
-* [前言](book/01-Preface/00-README.md)
-    * [目标](book/01-Preface/01-Preface.md#Goals)
-    * [语言设计错误](book/01-Preface/01-Preface.md#Language-Design-Errors)
-    * [测试用例](book/01-Preface/01-Preface.md#Tested-Examples)
-    * [名词](book/01-Preface/01-Preface.md#Popularity)
-    * [关于Andriod程序员](book/01-Preface/01-Preface.md#Android-Programmers)
-    * [关于电子版书籍](book/01-Preface/01-Preface.md#This-is-Only-an-eBook)
-    * [后记](book/01-Preface/01-Preface.md#Colophon)
-    * [鸣谢](book/01-Preface/01-Preface.md#Thanks)
-    * [其他](book/01-Preface/01-Preface.md#Dedication)
-* [介绍](book/02-Introduction/00-README.md)
-    * [前提条件](book/02-Introduction/01-Prerequisites.md)
-    * [JDK文档](book/02-Introduction/02-Documentation.md)
+* [On Java 8](book/00-On-Java-8.md)
+* [前言](book/01-前言.md)
+    * [目标](book/01-前言.md#目标)
+    * [语言设计错误](book/01-前言.md#语言设计错误)
+    * [测试用例](book/01-前言.md#测试用例)
+    * [名词](book/01-前言.md#名词)
+    * [关于Andriod程序员](book/01-前言.md#关于Andriod程序员)
+    * [关于电子版书籍](book/01-前言.md#关于电子版书籍)
+    * [后记](book/01-前言.md#后记)
+    * [鸣谢](book/01-前言.md#鸣谢)
+    * [其他](book/01-前言.md#其他)
+* [介绍](book/02-说明.md)
+    * [前提条件](book/02-说明.md#前提条件)
+    * [JDK文档](book/02-说明.md#JDK文档)
 
diff --git a/book/00-On-Java-8.md b/book/00-On-Java-8.md
new file mode 100644
index 0000000..e58deb2
--- /dev/null
+++ b/book/00-On-Java-8.md
@@ -0,0 +1,2 @@
+# On Java 8
+
diff --git a/book/01-Preface/01-Preface.md b/book/01-Preface/01-Preface.md
deleted file mode 100644
index 739aebd..0000000
--- a/book/01-Preface/01-Preface.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# 目标
-
diff --git a/book/01-Preface/00-README.md b/book/01-前言.md
similarity index 100%
rename from book/01-Preface/00-README.md
rename to book/01-前言.md
diff --git a/book/02-Introduction/01-Prerequisites.md b/book/02-Introduction/01-Prerequisites.md
deleted file mode 100644
index 4756735..0000000
--- a/book/02-Introduction/01-Prerequisites.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# 前提条件
-
diff --git a/book/02-Introduction/02-Documentation.md b/book/02-Introduction/02-Documentation.md
deleted file mode 100644
index 8e7a712..0000000
--- a/book/02-Introduction/02-Documentation.md
+++ /dev/null
@@ -1,2 +0,0 @@
-# JDK文档
-
diff --git a/book/02-Introduction/00-README.md b/book/02-说明.md
similarity index 100%
rename from book/02-Introduction/00-README.md
rename to book/02-说明.md