The Sham Chun River or Shenzhen River serves as the natural border between Hong Kong and Mainland China, together with the Sha Tau Kok River and Deep Bay.
Border between Mainland China and the Hong Kong S.A.R. - seen from Luohu District, Shenzhen, in July 2005
City of Shenzhen and Yuen Long
, Hong Kong, divided by Sham Chun River
It formed part of the limit of the lease of the New Territories in 1898 in the Convention for the Extension of Hong Kong Territory (also Second Convention of Peking).
It separates Yuen Long District, North District of Hong Kong and the city of Shenzhen, Guangdong. Its source is at Wutong Mountain, Shenzhen. Its tributaries includes Ping Yuen River, Shek Sheung River, Sheung Yue River, Ng Tung River, Buji River and Tan Shan River. The Shenzhen Reservoir also flows into the river when it is full.
The river flows into Deep Bay (also known as Hau Hoi Wan and Shenzhen Bay). The Mai Po Marshes is at its estuary.
Efforts have been made to alleviate flooding and pollution problems through river training, which produced the Lok Ma Chau Loop.
Coordinates: 22°30′N 114°02′E / 22.500°N 114.033°E