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