A farmer harvests wheat in a wheat field at Xiaowang Village of Dawang Town, in Xiongan New Area, north China's Hebei Province, June 13, 2019. Farmers are busy reaping as wheat gradually enter into the harvest season. (Xinhua/Zhu Xudong)

Aerial photo taken on June 13, 2019 shows the wheat field at Xiaowang Village of Dawang Town, in Xiongan New Area, north China's Hebei Province. Farmers are busy reaping as wheat gradually enter into the harvest season. (Xinhua/Zhu Xudong)

Aerial photo taken on June 13, 2019 shows the wheat field at Xiaowang Village of Dawang Town, in Xiongan New Area, north China's Hebei Province. Farmers are busy reaping as wheat gradually enter into the harvest season. (Xinhua/Xing Guangli)

A farmer harvests wheat in a wheat field at Xiaowang Village of Dawang Town, in Xiongan New Area, north China's Hebei Province, June 13, 2019. Farmers are busy reaping as wheat gradually enter into the harvest season. (Xinhua/Xing Guangli)

Aerial photo taken on June 13, 2019 shows the wheat field at Xiaowang Village of Dawang Town, in Xiongan New Area, north China's Hebei Province. Farmers are busy reaping as wheat gradually enter into the harvest season. (Xinhua/Xing Guangli)

A farmer harvests wheat in a wheat field at Xiaowang Village of Dawang Town, in Xiongan New Area, north China's Hebei Province, June 13, 2019. Farmers are busy reaping as wheat gradually enter into the harvest season. (Xinhua/Xing Guangli)