Giant panda Shuangxin rests at the panda house in Xining, northwest China's Qinghai Province, Aug. 9, 2020. Staff at the panda house celebrated the birthday of giant panda Shuangxin who turned nine on Sunday, along with giant panda Hexing who just turned seven on July 23. (Xinhua/Geng Huihuang)

Giant panda Hexing eats birthday meal at the panda house in Xining, northwest China's Qinghai Province, Aug. 9, 2020. Staff at the panda house celebrated the birthday of giant panda Shuangxin who turned nine on Sunday, along with giant panda Hexing who just turned seven on July 23. (Xinhua/Geng Huihuang)

Giant panda Hexing plays at the panda house in Xining, northwest China's Qinghai Province, Aug. 9, 2020. Staff at the panda house celebrated the birthday of giant panda Shuangxin who turned nine on Sunday, along with giant panda Hexing who just turned seven on July 23. (Xinhua/Geng Huihuang)

Giant panda Shuangxin eats birthday meal at the panda house in Xining, northwest China's Qinghai Province, Aug. 9, 2020. Staff at the panda house celebrated the birthday of giant panda Shuangxin who turned nine on Sunday, along with giant panda Hexing who just turned seven on July 23. (Xinhua/Geng Huihuang)