Yin Yanqiang instructs giant pandas doing morning exercise at Chongqing Zoo, southwest China's Chongqing Municipality, Aug. 3, 2017. Yin Yanqiang, technical director of giant panda house of Chongqing Zoo, is called as "dad of pandas". He has been working here for 4 years since he graduated from the Institute of Zoology of Chinese Academy of Science. (Xinhua/Wang Quanchao)
