The Lancang River originated from Tanggula Mountain on the Qinghai Plateau and flowed out of Xishuangbanna through Xishuangbanna. The process in Xishuangbanna is 158 kilometers. In ancient times, the Yi people called "Nanlan Zhang", which means "the river where millions of elephants reproduce". Jinghong to Olive Dam a section of natural scenery and humanistic landscape, is the most perfect microcosm of Xishuangbanna.