LangSon is a frontier mountainous province of Vietnam to the North-East.

This province covers an area of 830521 hectares (or 8305.21 square kilometers) and sharing with China a border line at 253 kilometers in length.
- This province is bounded on the North by CaoBang province: 55km.- It is bounded on the North-East by China: 253km.- It is bounded on the South by BacGiang province: 148km.- It is bounded on the South-East by QuangNinh province: 48km.- It is bounded on the West by BacKan province: 73km.- It is bounded on the South-West by ThaiNguyen province: 60km.

LangSon has got two international border gates including DongDang railway border gate and HuuNghi road border gate, two national border gates such as ChiMa (in LocBinh district) and BinhNghi (in TrangDinh district)..., and it shares seven border markets with China. So LangSon has an important strategic position in the North-East of Vietnam.Langson province has ten districts such as HuuLung, ChiLang, CaoLoc, LocBinh, DinhLap, VanLang, TrangDinh, VanQuan, BinhGia, BacSon; one city: LangSon city; and 226 communes and towns. LangSon city is the social economic political center of the