quality:correction
Imperial era

Jiangzhou subsequently remained under Qin Shi Huang 's rule during the Qin dynasty, the successor of the Qin State, as well as the rule of Han dynasty emperors.Jiangzhou was subsequently renamed during the Northern and Southern dynasties to Chu Prefecture (楚州), then again in 581 AD (Sui dynasty) to Yu Prefecture (渝州), and later in 1102 during Northern Song to Gong Prefecture (恭州). The name Yu however survives to this day as an abbreviation for Chongqing, as well as for the city's historic center, where the old town once stood; its name is Yuzhong (渝中, Central Yu). It received its current name in 1189, after Prince Zhao Dun of the Southern Song dynasty described his crowning as king and then Emperor Guangzong as a "double celebration" (simplified Chinese: 双重喜庆; traditional Chinese: 雙重喜慶; pinyin: shuāngchóng xǐqìng, or chóngqìng in short). To mark the occasion of his enthronement, Yu Prefecture was therefore converted to Chongqing Fu.

In 1362 (during the Yuan dynasty), Ming Yuzhen, a peasant rebel leader, established the Daxia Kingdom (大夏) at Chongqing for a short time. In 1621 (during the Ming dynasty), another short-lived kingdom of Daliang (大梁) was established by She Chongming (奢崇明) with Chongqing as its capital. In 1644, after the fall of the Ming dynasty to a rebel army, Chongqing, together with the rest of Sichuan, was captured by Zhang Xianzhong, who was said to have massacred a large number of people in Sichuan and depopulated the province, in part by causing many people to flee to safety elsewhere. The Manchus later conquered the province, and during the Qing dynasty, immigration to Chongqing and Sichuan took place with the support of the Qing emperor.

In 1890, the British Consulate General was opened in Chongqing. The following year, the city became the first inland commerce port open to foreigners, with the proviso that foreign ships should not be at liberty to trade there until Chinese-owned steamers had succeeded in ascending the river. This restriction was abolished by the Treaty of Shimonoseki in 1895, which declared the city open on the same terms as other ports, although it was not until 1907 that a steamship made the journey without the help of manual haulers. From 1896 to 1904, the American, German, French, and Japanese consulates were opened in Chongqing.