Aerial photo taken on April 7, 2021 shows volunteers patrolling the lake to keep the water clean in Wuzhuang Village of Chun'an County, east China's Zhejiang Province. Volunteers are encouraged to take part in the ecological environment protection in the county. (Photo by Mao Yongfeng/Xinhua)
Aerial photo taken on April 7, 2021 shows volunteers patrolling the lake to keep the water clean in Wuzhuang Village of Chun'an County, east China's Zhejiang Province. Volunteers are encouraged to take part in the ecological environment protection in the county. (Photo by Mao Yongfeng/Xinhua)
Aerial photo taken on April 7, 2021 shows volunteers patrolling the lake to keep the water clean in Wuzhuang Village of Chun'an County, east China's Zhejiang Province. Volunteers are encouraged to take part in the ecological environment protection in the county. (Photo by Mao Yongfeng/Xinhua)
