-NSEC consists of three major routes along the north–south axis of the GMS, namely,
-the Kunming–Chiang Rai–Bangkok via Lao People’s Democratic Republic (Lao PDR) or Myanmar route
-the Kunming– Ha Noi–Hai Phong route
-the Nanning–Ha Noi via the Youyi Pass or Fangcheng–Dongxing–Mong Cai route.