Underwater museum in SW China cleans cultural relics
By Yang Jinghao

A round of cleaning was completed at the Baiheliang Underwater Museum located in southwest China's Chongqing over the weekend. Workers cleaned silt and microorganisms that had accumulated on carvings. Baiheliang, or "White Crane Ridge," is a large stone ridge believed to be the world's oldest hydrographic survey station, dating back to the Tang Dynasty (618-907).

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