Tiu Keng Leng (調景嶺, also Rennie's Mill) is an area of Hong Kong adjacent to Tseung Kwan O (Junk Bay).

Rennie's Mill got its name from a Canadian businessman named Alfred Herbert Rennie, who established a flour mill at Junk Bay. The business failed, and Rennie hanged itself there in 1908. (Tiu Keng Leng was originally Diu Geng Leng, meaning "Hang around the neck".)

In the 1950s the (British) Hong Kong government settled a considerable number of refugees from China - former Nationalist soldiers and other Kuomintang supporters - at Rennie's Mill. For many years the area was a Kuomintang enclave known as "Little Taiwan", with its own schools system and practically off-limits to the Hong Kong Police.

In 1996 the Hong Kong government finally forcibly evicted Rennie's Mill's residents, ostensibly to make room for new town developments, but widely understood to be a move to please the Communist Chinese government before Hong Kong reverted to Communist Chinese rule in 1997.