Nantianmen is located at the southeast end of Baodongzhai Peak, high 13.9 meters, long 23 meters, three arch coupon gates, made from imitation Han white jade, red scorpion flying top, spectacular, is the largest mountain top mountain square-style mountain gate in China. Dengnan Tianmen attached, Bao Dongzhai Peak Ping column, under the door is a cliff, more showing the danger of Bao Dongzhai Junjuan.