/// <summary>
 /// 构造函数
 /// </summary>
 /// <param name="config">客户端配置</param>
 public YfyClient(YfyClientConfig config)
     : this(new YfyRequestHandler(config))
 {
 }
 public YfyRequestHandler(YfyClientConfig config)
 {
     this.YfyClientConfig = config;
 }