Aerial photo taken on March 27, 2020 shows farmers planting gingers at Baoxituo Village in Fengrun District of Tangshan, north China's Hebei Province. (Xinhua/Yang Shiyao)

Aerial photo taken on March 27, 2020 shows farmers planting gingers at Baoxituo Village in Fengrun District of Tangshan, north China's Hebei Province. (Xinhua/Yang Shiyao)

Aerial photo taken on March 27, 2020 shows farmers planting gingers at Baoxituo Village in Fengrun District of Tangshan, north China's Hebei Province. (Xinhua/Yang Shiyao)

Farmers set up greenhouse film for newly planted gingers at Baoxituo Village in Fengrun District of Tangshan, north China's Hebei Province, March 27, 2020. (Xinhua/Yang Shiyao)

Farmers set up greenhouse film for newly planted gingers at Baoxituo Village in Fengrun District of Tangshan, north China's Hebei Province, March 27, 2020. (Xinhua/Yang Shiyao)