A ring-tailed lemur is seen at Qingdao Forest Wildlife World in Qingdao, east China's Shandong Province, Nov. 15, 2018. (Xinhua/Yu Fangping)

　　A ring-tailed lemur is seen at Qingdao Forest Wildlife World in Qingdao, east China's Shandong Province, Nov. 15, 2018. (Xinhua/Yu Fangping)

　　Ring-tailed lemurs are seen at Qingdao Forest Wildlife World in Qingdao, east China's Shandong Province, Nov. 15, 2018. (Xinhua/Yu Fangping)