![Photo taken on Jan. 3, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/0e11c0264652459fb2a02460b504f565.jpg)
Photo taken on Jan. 3, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)
![Photo taken on Feb. 14, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/c6ffd0dce18a43aea6def27abec27140.jpg)
Photo taken on Feb. 14, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)
![Photo taken on Feb. 9, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/fcba49cf272b4147922d1cd9d14069fa.jpg)
Photo taken on Feb. 9, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)
![Photo taken on Jan. 27, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/8a989850892c44c6873300d21ba4c71d.jpg)
Photo taken on Jan. 27, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)
![Photo taken on Jan. 26, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/c02dbce549d34f6081a8b4e4bc347ce7.jpg)
Photo taken on Jan. 26, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)
![Photo taken on April 21, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/d3808b3710e9456eae1a8836e8c43a82.jpg)
Photo taken on April 21, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)
![Photo taken on April 2, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China\'s Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)](http://www.ecns.cn/hd/2018/05/30/be26b7da34394fdaad35fa8e4d49a633.jpg)
Photo taken on April 2, 2018 by an infrared camera shows a wild giant panda in Baishuijiang National Nature Reserve in northwest China's Gansu Province. (Xinhua/Baishuijiang National Nature Reserve)