Tsang Tai Uk, also known as "Zeng's House", formerly known as "Mountain Down Wai" or "Mountain Down Wai", is located next to the southern end of Bo Kang Tun, Shatin District, New Territories, Hong Kong. It is close to the Sierra Leone Tunnel. It is one of the best preserved villages in the area. The village was built during the Qingdao Light Year. During World War II, it was known as the “Zeng Dawu”.