Yanqing is a beautiful county of Beijing where situates the Great Wall. It's been called "the summer capital" since it has a cooler weather in summer days and many interesting places to have fun. There are many big natural parks and vacation villages where you can go for a picnic or go climbing and stuff. You'd better plan a trip for at least 2 days. To get there you can take No.919 bus in Deshengmen, there are just two stops, the Great Wall and the center of Yanqing.