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)

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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)

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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)

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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)

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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)

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

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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)