http://www.wingchina.com/en/flying%20the%20great%20wall%20of%20china.htm
This site is best for June to Oct.
Access
3 hours drive from Beijing, 120km. The Simatai Great Wall is a famour place to visit ,so nearl every local driver know how to go there.
MAIN ACTIVITIES
paragliding.
Other activities
paratrike ,
paratrike ,
paratrike.
WEATHER
Basically S,SE,SW wind can fly, and the take off site is at the half height of the mountain, so you should check the real wind direction