In this aerial photo taken on June 4, 2018, a combine harvester works in a wheat field in Chiping County of Liaocheng, east China's Shandong Province. By Tuesday, 20.7 million hectares of wheat had been harvested. Of that, 95.5 percent were reaped by combine harvesters, the Ministry of Agriculture and Rural Affairs said. (Xinhua/Zhao Yuguo)

A farmer harvests wheat in Tancheng County of Linyi, east China's Shandong Province, June 7, 2018. By Tuesday, 20.7 million hectares of wheat had been harvested. Of that, 95.5 percent were reaped by combine harvesters, the Ministry of Agriculture and Rural Affairs said. (Xinhua/Zhang Chunlei)

Farmers harvest wheat in Shanting District of Zaozhuang, east China's Shandong Province, June 2, 2018. By Tuesday, 20.7 million hectares of wheat had been harvested. Of that, 95.5 percent were reaped by combine harvesters, the Ministry of Agriculture and Rural Affairs said. (Xinhua/Li Zongxian)

In this aerial photo taken on June 4, 2018, farmers unload harvested wheat onto a truck in Changjiang Township of Rugao, east China's Jiangsu Province. By Tuesday, 20.7 million hectares of wheat had been harvested. Of that, 95.5 percent were reaped by combine harvesters, the Ministry of Agriculture and Rural Affairs said. (Xinhua/Xu Congjun)