Where did the high surname of Qianjiang in Chongqing come from?

According to relevant information: North China, Shaanxi-Gansu-Ningxia and Central Plains. During the Spring and Autumn Period and the Warring States Period, Gao was mainly active in North China, and during the Qin and Han Dynasties, Gao's footprint spread all over North China, Shaanxi, Gansu and Ningxia and the Central Plains. The last years of the Eastern Han Dynasty were the heyday of Gao's surname. In the Western Jin Dynasty, Gao mainly migrated to the north and northeast. During the Northern and Southern Dynasties, due to the demise of the Northern Qi Dynasty, Gao was forced to emigrate to southern Shaanxi and western Shu. During the Sui and Tang Dynasties, Gao's main activity place was still north of the Yangtze River, but he continued to migrate to Sichuan and Jiangsu and Zhejiang provinces. During the Five Dynasties, Song and Yuan Dynasties, Gao migrated to all parts of the south of the Yangtze River, especially in Jiangsu and Zhejiang provinces.