Zoo held 1-year-old birthday celebration for four panda cubs in Chongqing(1/6)

Four one-year-old giant panda cubs are seen at the Chongqing Zoo in southwest China's Chongqing, June 23, 2020. The zoo held a one-year-old birthday celebration for the four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, which combine to symbolize "double joy and happiness" in Chinese. (Photo/China News Service)

Four one-year-old giant panda cubs are seen at the Chongqing Zoo in southwest China's Chongqing, June 23, 2020. The zoo held a one-year-old birthday celebration for the four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, which combine to symbolize "double joy and happiness" in Chinese. (Photo/China News Service)

Four one-year-old giant panda cubs play at the Chongqing Zoo in southwest China's Chongqing, June 23, 2020. The zoo held a one-year-old birthday celebration for the four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, which combine to symbolize "double joy and happiness" in Chinese. (Photo/China News Service)

Two one-year-old giant panda cubs play at the Chongqing Zoo in southwest China's Chongqing, June 23, 2020. The zoo held a one-year-old birthday celebration for the four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, which combine to symbolize "double joy and happiness" in Chinese. (Photo/China News Service)

Photo taken on June 23, 2020 shows the special cake made of bamboo leaves, bamboo shoots, apples and carrots for the four giant panda cubs. (Photo/China News Service)

Four one-month-old giant panda cubs play at the Chongqing Zoo in southwest China's Chongqing, June 23, 2020. The zoo held a one-year-old birthday celebration for the four panda cubs named Shuangshuang, Chongchong and Xixi, Qingqing, which combine to symbolize "double joy and happiness" in Chinese. (Photo/China News Service)