Students experience a time machine at the Youth Science and Technology Museum in Hohhot, Inner Mongolia autonomous region on Dec 10. A primary school at Yuquan district organized a science promotion event at the museum, aiming to encourage students to do scientific explorations. [Photo by Ding Genhou/Xinhua]

Students interact with a smart robot at the museum in Hohhot, Inner Mongolia autonomous region, Dec 10. [Photo by Ding Genhou/Xinhua]