Parents take their child to watch a "mermaid show" at an aquarium in Guiyang, capital of southwest China's Guizhou Province, July 30, 2018. (Xinhua/Zhang Hui)

A performer dressed as a mermaid gives a show to visitors at an aquarium in Guiyang, capital of southwest China's Guizhou Province, July 30, 2018. (Xinhua/Zhang Hui)

A performer dressed as a mermaid gives a show to visitors at an aquarium in Guiyang, capital of southwest China's Guizhou Province, July 30, 2018. (Xinhua/Zhang Hui)