Aerial photo taken on Feb. 20, 2021 shows the fields in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Feb. 20, 2021 shows a farmer plowing the field in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Feb. 20, 2021 shows the fields in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Feb. 20, 2021 shows a farmer working in the field in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Feb. 20, 2021 shows the fields in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Feb. 20, 2021 shows the fields in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Aerial photo taken on Feb. 20, 2021 shows a farmer working in the field in Pumiao Township of Nanning City, south China's Guangxi Zhuang Autonomous Region.

Farmers build greenhouses in Wanmin Village of Baoying County, east China's Jiangsu province, Feb. 20, 2021.

A technician drives an agricultural machinery in the field in Tancheng County of Linyi City, east China's Shandong province, Feb. 20, 2021.

Farmers work in a greenhouse in Hongqi Village of Ciwu Township, Zhuji City, east China's Zhejiang province, Feb. 20, 2021.

Aerial photo taken on Feb. 20, 2021 shows farmers working in greenhouses in Wanmin Village of Baoying County, east China's Jiangsu province.

Farmers cover plastic mulch on the ground in a greenhouse in Qingzhou City, east China's Shandong province, Feb. 20, 2021.

Farmers trim peach branches in Gengzhang Village of Jiazhai Township in Liaocheng City, east China's Shandong province, Feb. 20, 2021.

Farmers plant tomato sprouts in a greenhouse in Qingzhou City, east China's Shandong province, Feb. 20, 2021.