Farmers dry honeysuckle in the fields at Shuangjingwang Village of Wuqiao County, north China's Hebei Province, May 27, 2018. Farmers here are guided to plant crops according to local conditions, which offers 3,000 households here a means of income increase. (Xinhua/Mu Yu)

A farmer collects honeysuckle in the fields at Shuangjingwang Village of Wuqiao County, north China's Hebei Province, May 27, 2018. Farmers here are guided to plant crops according to local conditions, which offers 3,000 households here a means of income increase. (Xinhua/Mu Yu)

A farmer harvests muskmelon in the fields at Dongguan Village of Wuqiao County, north China's Hebei Province, May 27, 2018. Farmers here are guided to plant crops according to local conditions, which offers 3,000 households here a means of income increase. (Xinhua/Mu Yu)

Farmers collect perilla leaf in the fields at Caowa Township of Wuqiao County, north China's Hebei Province, May 27, 2018. Farmers here are guided to plant crops according to local conditions, which offers 3,000 households here a means of income increase. (Xinhua/Mu Yu)