Json::Value json_temp; 
	json_temp["name"]	= "中国234";
	string name			= json_temp["name"].asString();
	Json::Value root;  		
	root["key_number"]	= Json::Value(12345);					
	root["key_boolean"] = Json::Value(false);					
	root["key_double"]	= Json::Value(12.345);					
	root["key_object"]	= json_temp;													
						
	Json::StreamWriterBuilder builder;
	builder["commentStyle"] = "None";
	builder["indentation"] = "";
	//string s		= fast_writer.write(root);
	//string_t s	= utility::conversions::to_string_t(fast_writer.write(root));
	//string result = fast_writer.write(root);
	string result = Json::writeString(builder, root);
	cout <<"name: "<< name << endl;	//is ok
	cout <<"result: "<< result << endl; //no ok
       ......