The delegation of TTM Viet Nam came to work with their partner at Chi Ma border gate to promote the Viet Nam - China trade.

Chi Ma border gate is a border gate in the land of Chi Ma village, Yen Khoai commune, Loc Binh district, Lang Son province , Vietnam .

Chi Ma border gate trade to Ai Diem border gate in Ninh Minh district, Guangxi province , China . Here there is milestone 1223 .

Chi Ma border gate is the end of provincial road 236 , and 13 km from Loc Binh town to the northeast.

In 2008, Lang Son announced the decision to make a detailed planning of Chi Ma border gate, serving the developing trade in the region. 

On February 20, 2013, the Prime Minister signed Decision 343/2013 / QD-TTg on upgrading Chi Ma border gate, Lang Son province from the secondary border gate to the main one.