Workers pack cotton by a cotton picker in Nangong, North China’s Hebei province, Oct 21, 2018.[Photo/Xinhua]

Aerial photo taken on Oct 21, 2018 shows a cotton picker working in a cotton field in Nangong, North China’s Hebei province. [Photo/Xinhua]

Workers harvest cotton by a cotton picker in Nangong, North China’s Hebei province, Oct 21, 2018. [Photo/Xinhua]

Workers harvest cotton by a cotton picker in Nangong, north China’s Hebei Province, Oct. 21, 2018. [Photo/Xinhua]