Lào Cai Province than with snowing conditions. Fog and frost are a common phenomenon in the province. Lào Cai is a mountainous region. In the northwest of the province is Phan Xi Păng (also called Fansipan; elevation , snow covered during winter season), Vietnam's highest mountain. It is located in the Hoàng Liên Sơn and the Hoàng Liên National Park. The Sa Pa Mountains form the western part of the province. While the province is drained by over 100 rivers, the main river that bisects the province is the Red River, (), the most significant river of northern Vietnam, which flows out of
Pang De of a Secondary Marquis (關內侯) to each of Pang De's four sons and gave them each 100 taxable households as their marquisates. The names of Pang De's sons were not recorded in history, except for one – Pang Hui (龐會). Pang Hui resembled his father in personality and served as a general in the Cao Wei state. The highest position he reached was Commandant-General of the Capital (中尉將軍). He was also enfeoffed as a marquis. The "Shu Ji" (蜀記) recorded that he participated in the conquest of Wei's rival state, Shu Han, in 263. After the fall of Shu, he