(210519) -- SHISHOU, May 19, 2021 (Xinhua) -- Aerial photo taken on May 17, 2021 shows milu deer, also known as Pere David's deer, wandering at a national nature reserve in Shishou, central China's Hubei Province. The nature reserve introduced 94 milu deer in 1993, 1994 and 2002 from the Beijing Nanhaizi Milu Park and the population has grown to 2,000-strong today. Being released into the wild, milu deer have established a wild self-sustaining population in the nature reserve. (Xinhua/Xiao Yijiu)