Chinese garbled characters returned by the server

The server returns Chinese garbled characters. the server writes the code in php and displays the Chinese garbled characters in the browser. the Chinese characters received by android are garbled characters, including database encoding, database tables, fields, and database connections, the apache server code is UTF-8, which is displayed in the browser: the content field is Chinese in the database {"posts": [{"post server returns Chinese garbled characters
The server side is written in php and displays garbled characters in the browser. Chinese characters received by android are garbled characters. database encoding, database tables, fields, database connections, and apache server encoding are UTF-8,

The result is displayed in the browser: the content field is Chinese in the database.
{"Posts": [{"post": {"ID": "1", "Account_ID": "A220", "Receiver_ID": "B220", "Consumption_Amount ": "100", "Content": "\ u9910 \ u5385 \ u6d88 \ u8d39", "Time": "2013-08-20" }}, {"post": {"ID ": "3", "Account_ID": "A220", "Receiver_ID": "B221", "Consumption_Amount": "10", "Content ": "\ u516c \ u4ea4 \ u8f66 \ u6d88 \ u8d39", "Time": "2013-08-21" },{ "post": {"ID": "4 ", "Account_ID": "A220", "Receiver_ID": "B222", "Consumption_Amount": "500", "Content": "\ u8d2d \ u00009 \ u6d88 \ u8d39 ", "Time": "2013-08-22" }}, {"post": {"ID": "5", "Account_ID": "A220", "Receiver_ID": "B223 ", "Consumption_Amount": "50", "Content": "\ u516c \ u4ea4 \ u8f66 \ u6d88 \ u8d39", "Time": "2013-08-08" }}, {"post ": {"ID": "6", "Account_ID": "A220", "Receiver_ID": "B224", "Consumption_Amount": "100", "Content ": "\ u624b \ u673a \ u5145 \ u503c", "Time": "2013-08-10" }}, {"post": {"ID": "7", "Account_ID ": "A220", "Receiver_ID": "B225", "Consumption_Amount": "1000", "Content": "\ u8f6c \ u8d26", "Time ": "2013-08-06" }}]}
Server code:

 
  

  

  Header ("Content-Type: text/html; charset = UTF-8 ");
  
$ Format = 'json'; // xml is the default
  
/* Connect to the database */
  
$ Link = mysql_connect ('localhost', 'root', '000000') or die ('cannot connect to the db ');
  
// Mysql_query ("set names UTF8 ");
  
Mysql_select_db ('Citi _ db', $ link) or die ('could not select the db ');
  
Mysql_query ("set names utf8 ");
  
Mysql_query ("SET CHARACTER_SET_CLIENT = utf8 ");
  
Mysql_query ("SET CHARACTER_SET_RESULTS = utf8 ");
  
$ Query = "SELECT * FROM 'consumption _ detail' WHERE 'account _ id' = 'a220 '";
  
$ Result = mysql_query ($ query, $ link) or die ('errant query: '. $ query );
  

  
$ Posts = array ();
  
If (mysql_num_rows ($ result )){
  
While ($ post = mysql_fetch_assoc ($ result )){
  
$ Posts [] = array ('post' => $ post );
  
}
  
}
  

  
/* Json format */
  
If ($ format = 'json '){
  
Header ("Content-type: text/html; charset = UTF-8 ");
  
Echo json_encode (array ('posts' => $ posts ));
  

  
}