People visit the Zuohai Marine World in Fuzhou, capital of southeast China's Fujian Province, May 2, 2021. (Xinhua/Song Weiwei)

A child visits the Zuohai Marine World in Fuzhou, capital of southeast China's Fujian Province, May 2, 2021. (Xinhua/Song Weiwei)

People visit the Zuohai Marine World in Fuzhou, capital of southeast China's Fujian Province, May 2, 2021. (Xinhua/Song Weiwei)

Children watch an interactive show at the Zuohai Marine World in Fuzhou, capital of southeast China's Fujian Province, May 2, 2021. (Xinhua/Song Weiwei)