Aerial photo taken on Oct. 15, 2020 shows people driving harvesters in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

An unmanned harvester works in paddy fields in Hongwei farm, northeast China's Heilongjiang Province, Oct. 15, 2020. (Xinhua/Wang Jianwei)

A man driving harvester works in paddy fields in Hongwei farm, northeast China's Heilongjiang Province, Oct. 15, 2020. (Xinhua/Wang Jianwei)

Aerial photo taken on Oct. 15, 2020 shows an unmanned harvester working in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on Oct. 15, 2020 shows people driving harvesters in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on Oct. 15, 2020 shows people driving harvesters in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on Oct. 15, 2020 shows people driving harvester in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on Oct. 15, 2020 shows people driving harvesters in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

Aerial photo taken on Oct. 15, 2020 shows people driving harvesters in paddy fields in Hongwei farm, northeast China's Heilongjiang Province. (Xinhua/Wang Jianwei)

A man driving harvester works in paddy fields in Hongwei farm, northeast China's Heilongjiang Province, Oct. 15, 2020. (Xinhua/Wang Jianwei)