Aerial photo taken on June 3, 2020 shows harvesters working in the wheat fields in Guocang town of Wenshang county, East China's Shandong province. [Photo/Xinhua]

Aerial photo taken on June 3, 2020 shows harvesters working in the wheat fields in Guocang town of Wenshang county, East China's Shandong province. [Photo/Xinhua]

People operating harvesters work in the wheat fields in Guocang town of Wenshang county, East China's Shandong province on June 3, 2020. [Photo/Xinhua]

People operating harvesters work in the wheat fields in Guocang town of Wenshang county, East China's Shandong province on June 3, 2020. [Photo/Xinhua]

A farmer stands next to a harvester working in the wheat fields in Guocang town of Wenshang county, East China's Shandong province on June 3, 2020. [Photo/Xinhua]

Villager Guo Bobo stands next to a harvester working in a wheat field in Guocang town of Wenshang county, East China's Shandong province on June 3, 2020. [Photo/Xinhua]

Villager Guo Bobo airs wheat in Guocang town of Wenshang county, East China's Shandong province on June 3, 2020. [Photo/Xinhua]