Aerial photo taken on Oct. 29, 2021 shows rice fields in Luanzhou, north China's Hebei Province. (Photo: Xinhua)

Aerial photo taken on Oct. 29, 2021 shows a farmer harvesting rice in Luanzhou, north China's Hebei Province. (Photo: Xinhua)

Aerial photo taken on Oct. 29, 2021 shows a farmer operating a harvester in a rice field in Luanzhou, north China's Hebei Province. (Photo: Xinhua)

Aerial photo taken on Oct. 29, 2021 shows rice fields in Luanzhou, north China's Hebei Province. (Photo: Xinhua)

A farmer operates a harvester in a rice field in Luanzhou, north China's Hebei Province, Oct. 29, 2021. (Photo: Xinhua)

Aerial photo taken on Oct. 29, 2021 shows farmers harvesting rice in Luanzhou, north China's Hebei Province. (Photo: Xinhua)