The largest well salt production base in my country is Zigong.

Zigong, the thousand-year-old salt capital, is located in southern Sichuan. It has a history of nearly two thousand years of well salt mining and production since the Emperor Zhang of the Eastern Han Dynasty. It is still one of the largest mine salt production bases in my country, with an annual output of more than 200 well salts. Thousands of tons.

The mining history of well salt can be traced back to the period of Emperor Zhang of the Eastern Han Dynasty 2,000 years ago. After development in the Tang and Song Dynasties, it could be used by one-tenth of the country's population during the Ming and Qing Dynasties and was sold to Sichuan. , Yunnan, Guizhou, Hunan, Hubei and other provinces. According to historical records, more than 13,000 wells were drilled in the more than 2,000 years of well salt mining, and some wells were as deep as 1,000 meters.

Well salt, salt made from underground brine by drilling wells, is called well salt. Well salt, there is salt only if there is a well. Unlike sea salt and lake salt contained in water, well salt is buried underground. To extract well salt, you must first drill a well.

History:

Salt production began in the Eastern Han Dynasty and has a history of well salt mining for more than two thousand years. The city name "Zigong" comes from the two salt wells "Ziliu Well" and "Dagong Well" that were paid tribute to the imperial court. Well salt. Zigong is my country's famous salt capital for thousands of years. It is an important salt industry town with a long history and rich culture. It has been producing well salt since the time of Emperor Zhang of the Eastern Han Dynasty.

For more than two thousand years, it was the center of well salt production in the country. The main types of table salt in the past dynasties include: sea salt, pond salt (lake salt), well salt, and rock salt (mineral salt). Sichuan well salt has a long history. According to documentary records and expert research, the world-famous Zhuotong Well in Daying County was founded during the Qingli period of the Northern Song Dynasty, more than 800 years earlier than in the West.

Books such as "History of Chinese Drilling Technology", "History of Chinese Science and Technology", "History of Chinese Well Salt Science and Technology" all call him "the father of the world's oil drilling" and "the pioneer of mechanical drilling."

Reference for the above content: Baidu Encyclopedia-Zigong Well Salt