Fatal error: Uncaught [XSErrorException] ../../api/DTapi/app/dtapi.com/allsearch/sdk/lib/XS.php(2558): fsockopen(): unable to connect to localhost:8383 (Connection refused)(2)
thrown in /www/wwwroot/www.liuqiuyi.com/api/DTapi/app/dtapi.com/allsearch/sdk/lib/XS.php on line 560
以下是该课程的一些特点：