The Great Clearance, also translated as the Great Evacuation or Great Frontier Shift, was caused by edicts issued in 1661, 1664, and 1679, which required the evacuation of the coastal areas of Guangdo
The Chou Wong Yi Kung Study Hall in Shui Tau Tsuen was erected in 1685 by the Tang Clan in honour of Zhou Youde and Wang Lairen.