three lakes consist of bai-shi lake, zhong-qian lake and long-shan lake, which are all man-made lakes and built in 1950s-1960s. bai-shi lake was built in 1958, which was mainly used to prevent flooding and irrigation, but also generate electricity and supply water. the reservoir has a storage capacity of about 11.97 million cubic meters. after the completion of bai-shi lake, zhong-dian lake began to be built and its storage capacity is 23.5 million cubic meters. lakes here provide visitors with services like fishing, sightseeing, as well as going boating. therefore, it becomes a part of middle yandang mountains scenery spots. it is said that the chinese television drama "nirvana in fire"(chinese: 琅琊榜) found views here at the first episode.