Photo taken on May 21, 2017 shows towering trees in a scenic spot at Tongdian township in Lanping Bai and Pumi autonomous county, Southwest China's Yunnan province, May 21, 2017. Lanping is located in the core area of the Three Parallel Rivers area, a world heritage site that includes sections of the Jinsha, Nujiang and Lancang rivers, with well-protected ecological environment. [Photo/Xinhua]