Introduction to Hani Palace: Rafting on Mengdong River starts from Hani Palace and ends at Niulu River. The rafting waterway is 17 kilometers long and takes two and a half hours. The river in Hani Palace is clear and blue, with rugged stone walls on both sides. The Hani Palace waterfall in front hangs straight down from the top of the cliff like a white gauze, making it feel like a paradise.