Where is Jincheng short for, Lanzhou?

Lanzhou, also known as Jincheng, has a profound historical origin. Qin Shihuang unified China into 36 counties, and Lanzhou belonged to Longxi County. At the beginning of the Western Han Dynasty, Lanzhou was still under the jurisdiction of Longxi County. In the second year of Emperor founding ceremony of the Han Dynasty (2 1 year BC), Huo Qubing led an army to explore the Xiongnu in the west and set up a garrison in the west of Lanzhou, paving the way for the Han Dynasty to open up four counties in Hexi. In the first year of Zhao Di (86 BC), Jincheng County was established in Lanzhou today, which was under the jurisdiction of Tianshui County. In six years, Zhao Han returned to Jincheng County. In the second year of Emperor Gaozu's Xuandi, after Zhao Chongguo pacified Xiqiang and stationed troops in Huangzhong, the rule of the Western Han Dynasty in Jincheng County was strengthened, and seven new counties were established successively. Emperor Guangwu of the Eastern Han Dynasty built Wu for 12 years, and Longxi County was established in Jincheng County. In the fourth year of Emperor Han 'an, Xiqiang Uprising, most of Jincheng County was occupied, and the county magistrate moved from Wu Yun to Wu Xiang, now Longxi County, Gansu Province, and moved back to Wu Yun twelve years later. At the end of the Eastern Han Dynasty, a new Jincheng County was established in Xiping County. Since then, Jincheng County has moved from Wuyun to Yuzhong, which is now the western part of Yuzhong County. After the establishment of the Western Jin Dynasty, it was still located in Jincheng County. At the end of the Western Jin Dynasty, in the first year of Liang Qian's Yong 'an (3 14), Jincheng County was divided into Zhiyang County and Lingju County, and Guangwu County, together with the newly established Yongdeng County, was located in three counties near Yaojie, Honggu District, Lanzhou City. In the same year, Jincheng County was moved from Yuzhong to Jincheng, and Jincheng County and County were in the same city. In the third year of Emperor Wendi (583), Jincheng County was changed to Lanzhou and the Governor's Office was established. Lanzhou is named after Gaolan Mountain in the south of the city. In the third year of Emperor Yang Di's great cause, Zicheng County was changed to Jincheng County, Lanzhou was changed to Jincheng County, Jincheng County and Didao County were under the leadership, and Jincheng was governed by the county. In the 13th year of Daye (6 17), Xue Ju, a captain of Jincheng, rose up against Sui Dynasty, calling himself the overlord of the Western Qin Dynasty, with the title of Qin Xing and the capital of Jincheng. Soon moved the capital to Tianshui, which was destroyed by the Tang Dynasty.