Photo taken on Dec. 11, 2019 shows the entrance of the China Pavilion at the UN Climate Change Conference COP25 in Madrid, Spain. Decorated with Chinese elements, the China Pavilion presents series of books and videos telling Chinese stories. (Xinhua/Lu Yang)

  Photo taken on Dec. 11, 2019 shows a corner of the China Pavilion at the UN Climate Change Conference COP25 in Madrid, Spain. Decorated with Chinese elements, the China Pavilion presents series of books and videos telling Chinese stories. (Xinhua/Lu Yang)

  Visitors read at the China Pavilion at the UN Climate Change Conference COP25 in Madrid, Spain, Dec. 11, 2019. Decorated with Chinese elements, the China Pavilion presents series of books and videos telling Chinese stories. (Xinhua/Lu Yang)

  A visitor reads at the China Pavilion at the UN Climate Change Conference COP25 in Madrid, Spain, Dec. 11, 2019. Decorated with Chinese elements, the China Pavilion presents series of books and videos telling Chinese stories. (Xinhua/Lu Yang)