A student learns to play Guzheng, a traditional Chinese musical instrument, at a primary school in Harbin, northeast China's Heilongjiang Province, Oct. 10, 2018. Since 2017, the government of Harbin has launched an "after-school service" program, in which students of more than 240 primary schools can stay at school and learn traditional cultures provided by schools while waiting for their parents to pick them up. (Xinhua/Wang Kai)