Suolongsi ~ Mengzi Expressway is an important section of the trunk national way (GZ40) Erlianhaote ~ Kunming ~ Hekou Highway and the national key highway Shanwei ~ Qingshuihe Highway in Yunnan Province. It is an important section of Kaiyuan ~ Hekou Highway, the connection line of Guangzhou ~ Kunming Section of the Planned National Expressway Network (“7189” Network) Transversal 18. It is also a major highway of Yunnan Province connecting Northwest and Southwest China and extending to Southeast Asian and South Asian countries. Suolongsi ~ Mengzi Expressway Subgrade Contract Section 4 undertaken by the Company starts at K159+440 and ends at K188+716.25, with the total length of 29.28026km. The project was commenced on October 28, 2008.