Photo taken on April 27, 2020 shows fishing boats berthing at a river basin in Zigui County of Yichang, central China's Hubei Province. Local authorities of Zigui County in Yichang will put a fishing ban into effect in the Yangtze river basin of Zigui section from May 1, 2020. (Photo by Wang Jiaman/Xinhua)

Aerial photo taken on April 27, 2020 shows fishing boats at a river basin in Zigui County of Yichang, central China's Hubei Province. Local authorities of Zigui County in Yichang will put a fishing ban into effect in the Yangtze river basin of Zigui section from May 1, 2020. (Photo by Lei Yong/Xinhua)

Aerial photo taken on April 27, 2020 shows fishing boats at a river basin in Zigui County of Yichang, central China's Hubei Province. Local authorities of Zigui County in Yichang will put a fishing ban into effect in the Yangtze river basin of Zigui section from May 1, 2020. (Photo by Lei Yong/Xinhua)

Photo taken on April 27, 2020 shows fishing boats berthing at a river basin in Zigui County of Yichang, central China's Hubei Province. Local authorities of Zigui County in Yichang will put a fishing ban into effect in the Yangtze river basin of Zigui section from May 1, 2020. (Photo by Wang Jiaman/Xinhua)