I will be visiting Hefei on 17th sep. How to go to Great Wall?

Hi, dear! The Great Wall has many sections. The best-preserved section is Badaling Great Wall in Beijing. To visit Badaling, you may fly to Beijing first (about 2 hours). Then, take Airport Express to Dongzhimen, and change to subway line 2 to Jishuitan (Exit B2). Then, walk eastward for about 600 yards (550 meters) to Deshengmen to take bus No. 877 to Badaling. ;)