Aerial photo taken on May 28, 2019 shows visitors having fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province. (Xinhua/Liu Dawei)

Aerial photo taken on May 28, 2019 shows visitors having fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province. (Xinhua/Liu Dawei)

Aerial photo taken on May 28, 2019 shows visitors having fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province. (Xinhua/Liu Dawei)

Aerial photo taken on May 28, 2019 shows visitors having fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province. (Xinhua/Liu Dawei)

Aerial photo taken on May 28, 2019 shows visitors having fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province. (Xinhua/Liu Dawei)

Aerial photo taken on May 28, 2019 shows visitors having fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province. (Xinhua/Liu Dawei)

Visitors have fun with yellow rubber ducks at Chimelong Water Park in Guangzhou, south China's Guangdong Province, May 28, 2019. (Xinhua/Liu Dawei)