Nginx 反向代理代理 求助

upstream uplocal3{ server localhost:9800; }

server { listen 80; server_name www.hbjdzx.org.cn;

 location /{
          proxy_connect_timeout   3;
          proxy_send_timeout      30;
          proxy_read_timeout      30;
          proxy_pass  http://uplocal3/TrainHelper/site/;
        #  proxy_pass http://192.168.1.111:9800/TrainHelper/site/;
          proxy_set_header   REMOTE_ADDR  $remote_addr;
          proxy_set_header  Host  $host;
        }
}

直接访问 http://192.168.1.111:9800/TrainHelper/site/的话可以请求的到， 但配置 Nginx 反向代理就请求不到，求各位大神帮忙，看下配置有什么问题。