Breeders hold panda cubs at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Panda cubs play at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
A panda cub plays at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Breeders present a "gift" to giant panda Xinxing at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Giant panda Xinxing plays at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Breeders hold panda cubs at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Panda cubs play at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Giant panda Xinxing eats at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
Panda cubs play at the Chongqing Zoo in southwest China's Chongqing on Jan. 21, 2020. Four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, together with the 37-year-old giant panda Xinxing, posed for a Chinese New Year greeting at the Chongqing Zoo. (Xinhua/Tang Yi)
