Hello, i am staying in Xuzhou, Jiangsu province. I want to visit Great wall of China.

Badaling Great Wall is recommended to you.
1. take the high speed train at Xuzhou East Railway Station to Beijing South Railway Station with duration of about 2.5 - 3.5 hours.
2. take the metro line 4 at Beijing South Station and get off at Xuanwumen Station where you transfer to metro line 2 to Jishuitan Station. Walk about 5 minutes to Deshengmen Station and take the Bus 877 to Badaling Great Wall.