Since ancient times, it was customary to carry out a purification ceremony by the river on joshi (March 3) in China, and the ceremony was transformed into a banquet during which people purified themselves and floated cups on the river on March 3.
中国においては、古い時代から上巳に水辺で禊を行う風習があり、それが3月3日に禊とともに杯を水に流して宴を行うようになったとされる。