© 2020 Historical Photographs of China

Workers with salt boring equipment, Tzuliuching, Zidong
Some salt boring rigs, Tzuliuching, Zidong
Testing a new gas well, at the salt wells, Tzuliuching, Zidong
A series of man-pumps, salt wells, Tzuliuching, Zidong
Eight boring tools, salt wells, Tzuliuching, Zidong
Workers by gas-fired brine evaporating pans, salt wells, Tzuliuching, Zidong
Salt boring rigs, and boats, Tzuliuching, Zidong
Emptying the brine, salt wells, Tzuliuching, Zidong
Carrying the brine to a higher level, salt wells, Tzuliuching, Zidong
Running brine into boats, salt wells, Tzuliuching, Zidong
Horse-powered pumps to raise brine from a lower level to a higher level, Tzuliuching, Zidong
Buffalo winch, salt wells, Tzuliuching, Zidong
Man-pump, boat to piping, salt wells, Tzuliuching, Zidong
Overseers with workers weighing sewn up bags of salt, Tzuliuching, Zidong