Giant panda twins He Hua (right) and He Ye enjoy a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. Sister and brother panda twins He Hua and He Ye celebrated their second birthday in Chengdu on Monday. (SHEN BOHAN / XINHUA)

Giant panda twins He Hua (right) and He Ye enjoy a special birthday "cake" and apples at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (SHEN BOHAN / XINHUA)

Visitors take photos as giant panda twins He Hua and He Ye enjoy a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (SHEN BOHAN / XINHUA)

Giant panda twins He Hua (left) and He Ye enjoy a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (SHEN BOHAN / XINHUA)

Giant panda twins He Hua (right) and He Ye enjoy a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (SHEN BOHAN / XINHUA)

Giant panda twins He Hua (left) and He Ye enjoy a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (XU BINGJIE / XINHUA)

Visitors take photos as giant panda twins He Hua (L) and He Ye enjoy a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (SHEN BOHAN / XINHUA)

Giant panda He Hua enjoys a special birthday "cake" and apples at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (TIAN GAOSHAN / XINHUA)

Giant panda He Hua enjoys a special birthday "cake" at the China Conservation and Research Center for the Giant Panda in Chengdu, southwest China's Sichuan Province, July 4, 2022. (XU BINGJIE / XINHUA)