Video PlayerClose
Children show greeting cards made to mark the World Hello Day which falls on Nov. 21 annually at the experimental primary school at Baokang County, central China's Hubei Province, Nov. 20, 2018. (Xinhua/Yang Tao)
Children show greeting cards made to mark the World Hello Day which falls on Nov. 21 annually at the experimental primary school at Baokang County, central China's Hubei Province, Nov. 20, 2018. (Xinhua/Yang Tao)