diff --git a/zh/05.4.md b/zh/05.4.md
index da81ec06..557d8aab 100644
--- a/zh/05.4.md
+++ b/zh/05.4.md
@@ -19,109 +19,109 @@ Go实现的支持PostgreSQL的驱动也很多，因为国外很多人在开发
 数据库建表语句：
 ```sql
 
-	CREATE TABLE userinfo
-	(
-		uid serial NOT NULL,
-		username character varying(100) NOT NULL,
-		departname character varying(500) NOT NULL,
-		Created date,
-		CONSTRAINT userinfo_pkey PRIMARY KEY (uid)
-	)
-	WITH (OIDS=FALSE);
+CREATE TABLE userinfo
+(
+	uid serial NOT NULL,
+	username character varying(100) NOT NULL,
+	departname character varying(500) NOT NULL,
+	Created date,
+	CONSTRAINT userinfo_pkey PRIMARY KEY (uid)
+)
+WITH (OIDS=FALSE);
 
-	CREATE TABLE userdeatail
-	(
-		uid integer,
-		intro character varying(100),
-		profile character varying(100)
-	)
-	WITH(OIDS=FALSE);
+CREATE TABLE userdeatail
+(
+	uid integer,
+	intro character varying(100),
+	profile character varying(100)
+)
+WITH(OIDS=FALSE);
 
 ```
 看下面这个Go如何操作数据库表数据:增删改查
 
 ```Go
 
-	package main
+package main
 
-	import (
-		"database/sql"
-		"fmt"
-		_ "github.com/lib/pq"
-	)
+import (
+	"database/sql"
+	"fmt"
+	_ "github.com/lib/pq"
+)
 
-	func main() {
-		db, err := sql.Open("postgres", "user=astaxie password=astaxie dbname=test sslmode=disable")
+func main() {
+	db, err := sql.Open("postgres", "user=astaxie password=astaxie dbname=test sslmode=disable")
+	checkErr(err)
+
+	//插入数据
+	stmt, err := db.Prepare("INSERT INTO userinfo(username,departname,created) VALUES($1,$2,$3) RETURNING uid")
+	checkErr(err)
+
+	res, err := stmt.Exec("astaxie", "研发部门", "2012-12-09")
+	checkErr(err)
+
+	//pg不支持这个函数，因为他没有类似MySQL的自增ID
+	// id, err := res.LastInsertId()
+	// checkErr(err)
+	// fmt.Println(id)
+
+	var lastInsertId int
+	err = db.QueryRow("INSERT INTO userinfo(username,departname,created) VALUES($1,$2,$3) returning uid;", "astaxie", "研发部门", "2012-12-09").Scan(&lastInsertId)
+	checkErr(err)
+	fmt.Println("最后插入id =", lastInsertId)
+
+
+	//更新数据
+	stmt, err = db.Prepare("update userinfo set username=$1 where uid=$2")
+	checkErr(err)
+
+	res, err = stmt.Exec("astaxieupdate", 1)
+	checkErr(err)
+
+	affect, err := res.RowsAffected()
+	checkErr(err)
+
+	fmt.Println(affect)
+
+	//查询数据
+	rows, err := db.Query("SELECT * FROM userinfo")
+	checkErr(err)
+
+	for rows.Next() {
+		var uid int
+		var username string
+		var department string
+		var created string
+		err = rows.Scan(&uid, &username, &department, &created)
 		checkErr(err)
-
-		//插入数据
-		stmt, err := db.Prepare("INSERT INTO userinfo(username,departname,created) VALUES($1,$2,$3) RETURNING uid")
-		checkErr(err)
-
-		res, err := stmt.Exec("astaxie", "研发部门", "2012-12-09")
-		checkErr(err)
-
-		//pg不支持这个函数，因为他没有类似MySQL的自增ID
-		// id, err := res.LastInsertId()
-		// checkErr(err)
-		// fmt.Println(id)
-
-		var lastInsertId int
-		err = db.QueryRow("INSERT INTO userinfo(username,departname,created) VALUES($1,$2,$3) returning uid;", "astaxie", "研发部门", "2012-12-09").Scan(&lastInsertId)
-		checkErr(err)
-		fmt.Println("最后插入id =", lastInsertId)
-
-
-		//更新数据
-		stmt, err = db.Prepare("update userinfo set username=$1 where uid=$2")
-		checkErr(err)
-
-		res, err = stmt.Exec("astaxieupdate", 1)
-		checkErr(err)
-
-		affect, err := res.RowsAffected()
-		checkErr(err)
-
-		fmt.Println(affect)
-
-		//查询数据
-		rows, err := db.Query("SELECT * FROM userinfo")
-		checkErr(err)
-
-		for rows.Next() {
-			var uid int
-			var username string
-			var department string
-			var created string
-			err = rows.Scan(&uid, &username, &department, &created)
-			checkErr(err)
-			fmt.Println(uid)
-			fmt.Println(username)
-			fmt.Println(department)
-			fmt.Println(created)
-		}
-
-		//删除数据
-		stmt, err = db.Prepare("delete from userinfo where uid=$1")
-		checkErr(err)
-
-		res, err = stmt.Exec(1)
-		checkErr(err)
-
-		affect, err = res.RowsAffected()
-		checkErr(err)
-
-		fmt.Println(affect)
-
-		db.Close()
-
+		fmt.Println(uid)
+		fmt.Println(username)
+		fmt.Println(department)
+		fmt.Println(created)
 	}
 
-	func checkErr(err error) {
-		if err != nil {
-			panic(err)
-		}
+	//删除数据
+	stmt, err = db.Prepare("delete from userinfo where uid=$1")
+	checkErr(err)
+
+	res, err = stmt.Exec(1)
+	checkErr(err)
+
+	affect, err = res.RowsAffected()
+	checkErr(err)
+
+	fmt.Println(affect)
+
+	db.Close()
+
+}
+
+func checkErr(err error) {
+	if err != nil {
+		panic(err)
 	}
+}
 ```
 
 从上面的代码我们可以看到，PostgreSQL是通过`$1`,`$2`这种方式来指定要传递的参数，而不是MySQL中的`?`，另外在sql.Open中的dsn信息的格式也与MySQL的驱动中的dsn格式不一样，所以在使用时请注意它们的差异。