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 Xun of the men of Xu Prefecture was carried out, gathering some 30,000 men. Xu Ji and the others offered the titles of General Tiance (天冊將軍) and "Brilliance Prince of the Congregation" (大會明王) to Pang, although Pang only accepted the General Tiance title at that time. Pang, leaving Xu and his father Pang Juzhi in charge at Xu Prefecture, departed Xu Prefecture on May 23, first attacking the Weibo troops, which had been attacking the rebel-controlled Feng County, Jiangsu, catching Weibo forces by surprise. He crushed the Weibo forces, and Taining forces, hearing of Weibo forces' defeat, also withdrew. Pang gathered