Baigong Mountain, located more than 40 kilometers southwest of Delingha City, the capital of Haixi Mongolian and Tibetan Autonomous Prefecture, is the most prominent peak in the northeast of Tuosu Lake. It is clearly marked. It is surrounded by deserts and marshes. Shaliang and Gobi can be seen everywhere. The alien site and the mysterious iron tubes of various theories are located in the cave under Baigong Mountain. Next to Baigong Mountain is the famous observatory of China's Zijinshan Observatory.