Aerial photo taken on May 5, 2021 shows milu deers in Dafeng Milu National Nature Reserve in Yancheng, east China's Jiangsu Province. Thanks to continued efforts to protect milu deer, the population of the species in the reserve has grown to 5,681, of which 1,820 are wild ones. 853 baby deers born in the nature reserve in 2020. (Photo by He Jinghua/Guangming Picture)

Photo taken on May 5, 2021 shows milu deers in Dafeng Milu National Nature Reserve in Yancheng, east China's Jiangsu Province. Thanks to continued efforts to protect milu deer, the population of the species in the reserve has grown to 5,681, of which 1,820 are wild ones. 853 baby deers born in the nature reserve in 2020. (Photo by He Jinghua/Guangming Picture)

Photo taken on May 5, 2021 shows milu deers in Dafeng Milu National Nature Reserve in Yancheng, east China's Jiangsu Province. Thanks to continued efforts to protect milu deer, the population of the species in the reserve has grown to 5,681, of which 1,820 are wild ones. 853 baby deers born in the nature reserve in 2020. (Photo by He Jinghua/Guangming Picture)

来源：GMW.cn