Members of a non-profit rescue team teach mouth-to-mouth resuscitation know-hows to visitors during the Sixth China Charity Fair (CCF) in Shenzhen, south China's Guangdong Province, Sept. 20, 2018. Focusing on public welfare and poverty alleviation, the three-day event kicked off at the Shenzhen Convention & Exhibition Center on Thursday. (Xinhua/Mao Siqian)