This is an excellent tour operator. They arrange 3 day long trips and arrange for visitors to go sightseeing- Beijing's main attractions as well hiking along the Great Wall are a part of this tour. Prices are exorbitant but worth it as the guides are excellent and well versed in the history of China. The three day tour including stays in luxury hotels totals around 6000 Yuans.
Address: Room 801, Oriental Place, 9 East Dongfang Lu, North Dongsanhuan Lu, Chaoyang