Aerial photo taken on Oct. 5, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region. (Photos: Xinhua/Zhou Hua)

Aerial photo taken on Oct. 5, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 5, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 4, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 4, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 5, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 4, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 5, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 5, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 4, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Oct. 4, 2020 shows a view of shrimp ponds in Hepu County of Beihai City, south China's Guangxi Zhuang Autonomous Region.