Giant panda Qianqian plays with one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Two giant panda cubs play in the snow at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian plays with her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian plays with her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian plays with one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian plays with one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian plays with one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian looks at one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian chases one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian plays with one of her cubs at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)

Giant panda Qianqian helps one of her cubs climb a tree at Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong National Nature Reserve, southwest China's Sichuan Province, Jan. 17, 2021. (Xinhua/Jiang Hongjing)