Feeder Yao Jing holds a penguin doll at an exhibition area in the Harbin Polarland in Harbin, northeast China's Heilongjiang Province, Feb. 8, 2018. Yao Jing is a feeder for penguins at the Harbin Polarland. Among all the penguins she feed, one named "Baobao" is particularly close to her. (Xinhua/Wang Jianwei)