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 Xi Zhang owed him a huge favour for saving his brothers' families in Chang'an and also because he thought that Liu Zhang deeply trusted him. It turned out that Liu Zhang gradually distrusted Pang Xi and began to alienate him. Around 211, when Liu Zhang's adviser Zhang Song urged his lord to invite another warlord Liu Bei into Yi Province to counter the threat posed by Zhang Lu, he warned Liu Zhang that Pang Xi might secretly harbour the intention of overthrowing him. In 214, after Liu Bei seized control of Yi Province from Liu Zhang, he appointed Pang Xi as