Chongqing's Wushan clears 20,000 tons of river debris in the Yangtze annually

"The water quality of the Yangtze River in the Wushan section has reached Class II for eight consecutive years," said Chen Peng, deputy head of the county's ecology and environment bureau. He added that 12 new fish species have been added to the area.

The county invests around 6 million yuan ($833,000) each year in debris-clearing efforts, according to Yu from the debris-clearing team.