CHONGQING, Feb. 4, 2016 -- A person in charge of the Chongqing Zoo awards an honorable certificate to Cao Li, namer of giant panda cub Ding Ding at the Chongqing Zoo in Chongqing, southwest China, Feb. 4, 2016. A naming contest for the cub was launched in January. Dingding, which was born on Aug. 30 of 2015, was given birth by Yaya, a 16-year-old panda which also gave birth to four other female pandas. (Xinhua/Tang Yi)