Putting river lanterns (also often written as putting "lotus lanterns") is a traditional Chinese custom for prayers and blessings. It is popular in Han, Mongolia, Daur, Yi, Bai, Naxi, Miao, Dong, Buyi, Zhuang, and Tujia areas. River lights are often set off by the water at night of March 3, Qiqiao, and Mid-Autumn Festival.