Diver cleans White Crane Ridge 30 meters below the Yangtze River

A diver was spotted carrying out protection and cleaning work on White Crane Ridge at Chongqing's Baiheliang Underwater Museum 30 meters below the Yangtze River surface on Tuesday. 　

Baiheliang Underwater Museum is the world's first underwater museum and is reputed as "the world's first museum of an underwater site that can be accessed without diving" by UNESCO. 　

With a width of 16 meters and a length of 1,600 meters, White Crane Ridge, bearing surviving carved inscriptions, was an ancient hydrometric station that used stone fish carvings to measure the water levels of the Yangtze River during dry seasons for more than 1,200 years. 　

White Crane Ridge has been underwater for a long time, and the complex underwater environment bred microorganisms and covered the surface with sediment. The museum regularly arranges divers to clean and maintain the underwater inscription.