Gengwang Lake, with its source coming from Buquan River, is a seasonal natural lake located at the junction of Buquan, Nanwei and Pingshan townships, near Jiuwang Village, Silian Village, Nanwei Town and Xinwang Village, Bangning, Nanwei Town. Gengwang Lake has different scenery in each season, so it is also known as the "Face-Changing Lake". It is a typical karst terrain with an excellent ecological environment, with beautiful scenery and clear waters.