South China tiger cubs and their mother Xiaohua are seen at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Sept. 26, 2020. The four South China tiger cubs, born on May 21 this year, made their first public appearance at the Changsha Ecological Zoo on Saturday. (Xinhua/Chen Zhenhai)

South China tiger cubs and their mother Xiaohua are seen at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Sept. 26, 2020. The four South China tiger cubs, born on May 21 this year, made their first public appearance at the Changsha Ecological Zoo on Saturday. (Xinhua/Chen Zhenhai)

South China tiger cubs are seen at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Sept. 26, 2020. The four South China tiger cubs, born on May 21 this year, made their first public appearance at the Changsha Ecological Zoo on Saturday. (Xinhua/Chen Zhenhai)

A South China tiger cub is seen at the Changsha Ecological Zoo in Changsha, central China's Hunan Province, Sept. 26, 2020. The four South China tiger cubs, born on May 21 this year, made their first public appearance at the Changsha Ecological Zoo on Saturday. (Xinhua/Chen Zhenhai)