Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

A breeder takes care of a baby giant panda at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province, May 26, 2019. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

A breeder takes care of a baby giant panda at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province, May 26, 2019. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)

Photo taken on May 25, 2019 shows baby giant pandas at the "Giant Panda Kindergarten" in the Shenshuping base of China Conservation and Research Center for Giant Pandas in Wolong, southwest China's Sichuan Province. The "Giant Panda Kindergarten", located in the Wolong National Nature Reserve, raises 18 giant panda babies nowadays. (Xinhua/Xue Yubin)