You can get all the gear you need at Decathlon. Tents, sleeping bags and other kit can also be bought at bargaining centers, but check them thoroughly, as you don’t want to face the elements with dodgy equipment.
Decathlon: Decathlon is the place to buy genuine, good quality camping supplies for the entire family. While it doesn’t sell bigger sizes for men, their selection of equipment covers ball and racquet sports and athletics. It also has a good selection of camping equipment, including tents, sleeping bags and portable barbecues. Shops can be found at 195 Dongsihuan Zhonglu (010 87778788) and Wenhuayuan Xilu, Beijing Economic Technological Development Area, south-east Fifth Ring Road. (01067826100)
West China Company will take care of your entire trip. West China offers trips around the countryside, and excursions closer to Beijing include camping on the Great Wall. English guides are available to guide you and can even cook a tasty meal.