Aerial photo taken on Oct. 23, 2021 shows a section of Ya'an-Xichang expressway in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Xinhua)

Aerial photo taken on Oct. 23, 2021 shows a section of Ya'an-Xichang expressway in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Xinhua)

Aerial photo taken on July 15, 2021 shows a view of Lianghekou hydropower plant on the Yalong River in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Xinhua)

Aerial photo taken on July 15, 2021 shows a view of Lianghekou hydropower plant on the Yalong River in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Xinhua)

Aerial photo taken on April 30, 2021 shows the Chengdu Tianfu International Airport in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Photo by Wang Ruilin/Xinhua)

Aerial photo taken on Oct. 21, 2021 shows an entrance of a tunnel on Ya'an-Kangding expressway in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Xinhua/Shen Bohan)

Aerial photo taken on Dec. 9, 2019 shows Keku Bridge on Wenchuan-Ma'erkang expressway in southwest China's Sichuan Province. A series of "Super Projects" in Sichuan have been built to promote the development of western China, making contributions to local economic and social development. (Xinhua)