A parent takes a child at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]

A child plays at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]

A child plays at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]

Children play at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]

Children are seen at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]

Children plays at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]

A parent takes her child at Xiamen Science and Technology Museum in Xiamen, East China's Fujian province, July 22, 2018. [Photo/Xinhua]