Children visit the science and technology museum in Zhengzhou, Central China’s Henan province, Oct 7, 2018. [Photo/Xinhua]
Children visit the science and technology museum in Zhengzhou, Central China’s Henan Province, Oct 7, 2018. [Photo/Xinhua]
Children visit the science and technology museum in Zhengzhou, Central China’s Henan Province, Oct 7, 2018. [Photo/Xinhua]
