On April 25, 1886, China signed the Vietnamese border trade charter. The French Ambassador to China in 1885 to December 1885 submitted to the Prime Minister Li Hongqing a Charter on the Vietnamese Border Trade Charter, putting forward a number of trade ports, import and export tariffs and customs duties halved, the Vietnamese border trade charter was signed in Tianjin after a short period of negotiations, the Vietnamese-French Southern Border Trade Charter was signed in Tianjin. The main provision is that the Chinese ports were completely rejected by the Prime Minister Li Hongqing to negotiate. On April 25, 1886, Li Hongqing and the French Ambassador to China in Tianjin signed the Charter on the Vietnamese-French Southern Border Trade Charter after a short period of