唐宋时期,乐山城市日益发展,逐渐成为川南地区一个重要的封建性政治、经济、交通和文化中心城市。 一、隋以后乐山沿革及城市概况 周保定初（公元561年）在乐山设平羌县,并为平羌郡治。后郡徒,仍为平羌县治,这是现在可以肯定的乐山最早设“治”（一个地区的封建政治中心）的情况。隋文帝开皇四年,改平羌为峨眉,九年改青衣,十三年改为龙游。终隋一代,乐山为龙游县治。唐因之,且嘉州和犍为郡中都督府都先后治此。前、后蜀时期,乐山为龙游县,嘉州治。北宋为龙游县（一度改为嘉祥县,后复）、嘉州犍为郡治,嘉庆军节度使驻此。南宋后期,因乐山处于抗元前线,成为长江上游一重要军事支撑点,又升嘉州为嘉定府,仍治龙游县。总之,隋以后,乐山作为“治”从未间断,这与 During the Tang and Song dynasties, the Leshan city grew in size and became an important feudal political, economic, traffic and cultural center in southern Sichuan. First, the history of Leshan after the Sui Dynasty and the city profile Zhou Baoding (AD 561) in Leshan Ping Qiang County, and Ping Qiang gun governance. After the county disciples, is still Ping Qiang county government, which is now the earliest Leshan “rule” (a feudal political center in the region) situation. Sui Wendi Kai Huang four years, Ping Qiang Emei, Tsing Yi nine years, thirteen years to Longyou. The final Sui generation, Leshan Longyou County. Don because of this, and Jiazhou and 犍 for the county government has governor of this. Before and after Shu period, Leshan Longyou County, Jiazhou governance. North Song Longyou County (once changed to Jiaxiang County, after the complex), Jiazhou 犍 for the county government, Jiaqing Jun Jiedushi stationed here. In the late Southern Song Dynasty, Leshan was in an anti-Yuan frontline and became an important military support point in the upper reaches of the Yangtze River. It also promoted Jiazhou to Jiading Prefecture and still managed Longyou County. In short, after the Sui Dynasty, Leshan as “rule” has never stopped, this and