Students watch a drone flying demonstration during a science awareness activity at a primary school in Shijiazhuang, north China's Hebei Province, Sept. 18, 2018. (Xinhua/Zhang Shuo)
2018-09-19
Students watch a drone flying demonstration during a science awareness activity at a primary school in Shijiazhuang, north China's Hebei Province, Sept. 18, 2018. (Xinhua/Zhang Shuo)
Xinhua