A farmer works at a field in Yangjiao Town of Wulong District of Chongqing Municipality, southwest China, March 26, 2020. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows the spring scenery of Yanshanhong Village of Yangjiao Town in Wulong District, southwest China's Chongqing. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows the spring scenery of Yanshanhong Village of Yangjiao Town in Wulong District, southwest China's Chongqing. (Xinhua/Wang Quanchao)

Farmers work at a field in Yangjiao Town of Wulong District of Chongqing Municipality, southwest China, March 26, 2020. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows the spring scenery of Yanshanhong Village of Yangjiao Town in Wulong District, southwest China's Chongqing. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows farmers work at a field in Yangjiao Town of Wulong District of Chongqing Municipality, southwest China. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows the spring scenery of Yanshanhong Village of Yangjiao Town in Wulong District, southwest China's Chongqing. (Xinhua/Wang Quanchao)

A farmer works at a field in Yangjiao Town of Wulong District of Chongqing Municipality, southwest China, March 26, 2020. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows the spring scenery of Yanshanhong Village of Yangjiao Town in Wulong District, southwest China's Chongqing. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows a farmer works at a field in Yangjiao Town of Wulong District of Chongqing Municipality, southwest China. (Xinhua/Wang Quanchao)

A farmer works at a field in Yangjiao Town of Wulong District of Chongqing Municipality, southwest China, March 26, 2020. (Xinhua/Wang Quanchao)

Aerial photo taken on March 26, 2020 shows the spring scenery of Yanshanhong Village of Yangjiao Town in Wulong District, southwest China's Chongqing. (Xinhua/Wang Quanchao)