was usually based on locations of existing salt springs.

In mountainous areas, a similar technique called sink works (from German sinkwerk) is used.

History

Brine wells and salt solution mining have been used in China for more than 2000 years. The first recorded salt well in China was dug in the Sichuan province around 2,250 years ago. This was the first time that ancient water well technology was applied successfully for the exploitation of salt,

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