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Oldest salt well harnesses 2,000-year-old method in SW China

By Yao Yao | chinadaily.com.cn | 2017-04-26 11:00
Oldest salt well harnesses 2,000-year-old method in SW China

A worker boils the brine at the Shenhai salt well in Da'an district, Zigong city, Southwest China's Sichuan province, on April 25, 2017. [Photo by TG/ provided to chinadaily.com.cn]

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