Vietnam coastline is long. At its narrowest point in the central Quảng Bình Province, the country is as little as across, though it widens to around in the north. Vietnam's land is mostly hilly and densely forested, with level land covering no more than 20%. Mountains account for 40% of the country's land area, and tropical forests cover around 42%. The northern part of the country consists mostly of highlands and the Red River Delta. Fansipan (also called as Phan Xi Păng) which is located in Lào Cai Province is the highest mountain in Vietnam, standing high. The Red River Delta
Pang Xi the Governor of Yi Province. During this time, Liu Zhang appointed Pang Xi as the Administrator (太守) of Baxi Commandery (巴西郡; around present-day Langzhong, Sichuan) and ordered him to lead troops to attack his rival, Zhang Lu, in Hanzhong Commandery. Although Pang Xi never managed to make any territorial gains in Hanzhong Commandery, Liu Zhang still left him in charge of Baxi Commandery to guard against possible advances by Zhang Lu. Liu Zhang also arranged for his eldest son, Liu Xun (劉循), to marry Pang Xi's daughter. As time passed, Pang Xi became increasingly arrogant because he believed that Liu