Hoàng Liên Sơn mountains 30 km wide ,stretching 180 km northwest-southeast, between Lao Cai and Lai Chau province extends into the western province of Yen Bai.This is the end of the Ai Lao Shan, the southeast end of the Himalaya Mountains. The north-western part of the mountains there are many mountains over 2,800 meters high, including tall Fansipan 3,143m, highest in Indochina.

Fansipan Peak is the highest peak in Vietnam, is considered as the roof of Indochina.The bottom of the mountain in the distance is the town of Sa Pa lies at an altitude of 1,500 m above sea level.

According to VietKings (Kyluc.vn)