chapter04: Translation the introduction

And the chapter title.

chapter04/chapter04.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="ISO-8859-1"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE chapter PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
   <!ENTITY % general-entities SYSTEM "../general.ent">
@@ -9,7 +9,7 @@
   <?dbhtml dir="chapter04"?>
   <?dbhtml filename="chapter04.html"?>
 
-  <title>Final Preparations</title>
+  <title>最后准备工作</title>
 
   <xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="introduction.xml"/>
   <!--<xi:include xmlns:xi="http://www.w3.org/2001/XInclude" href="aboutlfs.xml"/>-->

chapter04/introduction.xml

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="ISO-8859-1"?>
+<?xml version="1.0" encoding="UTF-8"?>
 <!DOCTYPE sect1 PUBLIC "-//OASIS//DTD DocBook XML V4.5//EN"
   "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
   <!ENTITY % general-entities SYSTEM "../general.ent">
@@ -8,15 +8,21 @@
 <sect1 id="prepare-introduction">
   <?dbhtml filename="introduction.html"?>
 
-  <title>Introduction</title>
+  <title>简介</title>
 
-  <para>In this chapter, we will perform a few additional tasks to prepare
+  <!--para>In this chapter, we will perform a few additional tasks to prepare
   for building the temporary system. We will create a directory in
   <filename class="directory">$LFS</filename> for the installation of the
   temporary tools, add an unprivileged user to reduce risk,
   and create an appropriate build environment for that user. We will also
   explain the unit of time we use to measure how long LFS packages take to
   build, or <quote>SBUs</quote>, and give some information about package
-  test suites.</para>
+  test suites.</para-->
+  <para>在本章中，我们将为构建临时系统进行一些额外的准备工作。
+	  我们将在 <filename class="directory">$LFS</filename>
+	  中创建一个用于安装临时工具的目录，增加一个非特权用户以降低风险，
+	  并为该用户建立合适的构建环境。
+	  我们还将解释 LFS 软件包构建时间长度的测量单位，即 <quote>SBU</quote>
+	  的概念，并给出关于软件包测试套件的一些信息。</para>
 
 </sect1>