Is it true that earthworms migrated from the Youxi River in Jiangjin District, Chongqing?

Yes.

Chongqing, referred to as "Yu", also known as Mountain City, is a provincial-level administrative region of the People's Republic of China, the only municipality directly under the central government in the central and western regions, a national central city, a megacity, and an important central city in China approved by the State Council 1. The economic center of the upper reaches of the Yangtze River, an important national modern manufacturing base, and a comprehensive transportation hub in southwest China. With a total area of ​​82,400 square kilometers, it governs 26 districts, 8 counties, and 4 autonomous counties. It has a permanent population of 31.2432 million, an urban population of 20.8699 million, and a permanent migrant population of 1.6765 million. ?

In the early Qing Dynasty, the "Huguang Reclamation of Sichuan" movement gave Chongqing a long history of immigration and rich immigrant culture, laying the foundation of modern Chongqing society. The area under the jurisdiction of today's Chongqing Municipality was still divided into Chongqing Prefecture and Kuizhou Prefecture throughout the Qing Dynasty, and later it was divided into Youyang Zhili Prefecture and Zhongzhou Zhili Prefecture. ?

In the 16th year of Guangxu (1890), China and Britain signed the "Special Article for the Continuation of the Yantai Treaty" and Chongqing was opened as a commercial port. In March of the seventeenth year of Guangxu (1891), Chongqing Customs was established near Chaotianmen.

In the 21st year of Guangxu (1895), the Qing government was defeated by Japan in the Sino-Japanese War of 1895. According to the "Treaty of Shimonoseki" signed in April of that year, Chongqing became the first batch of cities to open to Japan. Inland trading port. In the twenty-seventh year of Guangxu (1901), Japan established a Japanese concession in Wangjiatuo, Nan'an District. In the same year, France successively established a naval dock and barracks near Danzishi in today's Nan'an District.