深圳河
Huanggang Port () or the Lok Ma Chau Control Point () is a port of entry/border crossing on the border between mainland China and Hong Kong, in the Futian District of Shenzhen and Lok Ma Chau in Hong Kong's New Territories, across the Sham Chun River from Huanggang. It opened in 1989. It started providing 24-hour passenger clearance in January 2003, and is still the only Hong Kong control point with Shenzhen in mainland China to do so Before reaching this point, vehicles must pass through police checkpoints along road to Lok Ma Chau Control Point. Permits must be carried in order to pass these points and to travel to the control points.