Aerial photo taken on June 2, 2020 shows harvesters working at the wheat fields in Zhoukou City, central China's Henan Province. (Xinhua/Li Jianan)

Aerial photo taken on June 2, 2020 shows harvesters working at the wheat fields in Zhoukou City, central China's Henan Province. (Xinhua/Li Jianan)

Aerial photo taken on June 2, 2020 shows harvesters working at the wheat fields in Zhoukou City, central China's Henan Province. (Xinhua/Li Jianan)

Aerial photo taken on June 2, 2020 shows a harvester working at the wheat fields in Zhoukou City, central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on June 2, 2020 shows harvesters working at the wheat fields in Zhoukou City, central China's Henan Province. (Xinhua/Feng Dapeng)

Aerial photo taken on June 2, 2020 shows harvesters working at the wheat fields in Zhoukou City, central China's Henan Province. (Xinhua/Li Jianan)