A cotton picker works in a field in Wangdaozhai Township of Nangong City, north China's Hebei Province, Oct. 27, 2020. (Xinhua/Mu Yu)

Aerial photo taken on Oct. 27, 2020 shows a cotton picker working in a field in Wangdaozhai Township of Nangong City, north China's Hebei Province. (Xinhua/Mu Yu)

Aerial photo taken on Oct. 27, 2020 shows a cotton picker working in a field in Wangdaozhai Township of Nangong City, north China's Hebei Province. (Xinhua/Mu Yu)

A cotton picker works in a field in Wangdaozhai Township of Nangong City, north China's Hebei Province, Oct. 27, 2020. (Xinhua/Mu Yu)

Aerial photo taken on Oct. 27, 2020 shows a cotton picker working in a field in Wangdaozhai Township of Nangong City, north China's Hebei Province. (Xinhua/Mu Yu)

A farmer harvests cotton in a field in Wangdaozhai Township of Nangong City, north China's Hebei Province, Oct. 27, 2020. (Xinhua/Mu Yu)