天津大学生义务植树持续开展29年 用绿色增添城市之美

This aerial photo taken on Dec. 24, 2023 shows visitors having fun on the Wawu Mountain in Hongya County, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

A visitor poses for photos on the Wawu Mountain in Hongya County, southwest China's Sichuan Province, Dec. 24, 2023. (Xinhua/Jiang Hongjing)

Visitors enjoy the sunrise scenery on top of the Wawu Mountain in Hongya County, southwest China's Sichuan Province, Dec. 24, 2023. (Xinhua/Jiang Hongjing)

This aerial photo taken on Dec. 24, 2023 shows the scenery seen from top of the Wawu Mountain in Hongya County, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

This aerial photo taken on Dec. 24, 2023 shows visitors having fun on an observation platform of the Wawu Mountain in Hongya County, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

This aerial photo taken on Dec. 24, 2023 shows a view of Mount Gongga seen from top of the Wawu Mountain at sunrise in Hongya County, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

This aerial photo taken on Dec. 24, 2023 shows a view of Mount Gongga seen from top of the Wawu Mountain in Hongya County, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

Visitors have fun on the Wawu Mountain in Hongya County, southwest China's Sichuan Province, Dec. 24, 2023. (Xinhua/Jiang Hongjing)

Visitors have fun on the Wawu Mountain in Hongya County, southwest China's Sichuan Province, Dec. 24, 2023. (Xinhua/Jiang Hongjing)

This aerial photo taken on Dec. 24, 2023 shows the scenery seen from top of the Wawu Mountain in Hongya County, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)