How is Zigong well salt formed? Formation process of Zigong well salt.

1. Well salt is usually deposited by inland water bodies. Zigong is a city in Sichuan Province, which is rich in well salt. It is said that the history of mining well salt here can be traced back to the Eastern Han Dynasty.

2. There are more than 10,000 salt wells in Zigong, including the world's first salt well with a depth exceeding 1000 meters. The local salt drilling and pumping technology has also been listed in the first batch of national intangible cultural heritage in China.

3. Well salt, mineral salt, pond salt and sea salt are the main edible salts used in ancient China, among which well salt is the most complicated salt making process in ancient times, which can best reflect the wisdom of ancient people in China.