It diverges from Fanling Highway of Route 9 at Kau Lung Hang, crosses Sha Tau Kok Road and connects to Heung Yuen Wai Control Point, a border checkpoint between Hong Kong and China which opened for freight traffic on 26 August 2020.

Construction of the section from Fanling Highway Interchange to Lau Shui Heung involved the drill-and-blast method, whereas the segment from Lau Shui Heung to Sha Tau Kok Road Interchange was constructed with a tunnel boring machine (TBM).

[7] In September 2008 a decision was made jointly by the Hong Kong and Shenzhen governments to undertake the construction of the Liantang/Heung Yuen Wai Boundary Control Point,[8] to be connected to Hong Kong's existing highway network by way of a dual two-lane trunk Connecting Road.

[9] The contract to construct Lung Shan Tunnel was awarded to Dragages-Bouygues Joint Venture at HK$10.314 billion.

[11] Meanwhile, the construction contracts for the Fanling Highway Interchange and the section between Sha Tau Kok Road and Lin Ma Hang Road were awarded to Chun Wo Construction and Engineering Company Limited and CRBC-CEC-KADEN Joint Venture respectively, at costs of HK$2.545 billion and HK$6.518 billion.