People work at a modern agricultural park in Nanhe County, north China's Hebei Province, April 30, 2020. In recent years, local authorities of Nanhe County have been promoting agricultural modernization to boost local economy and increase people's income. (Photos: Xinhua)

People work at a modern agricultural park in Nanhe County, north China's Hebei Province, April 30, 2020. In recent years, local authorities of Nanhe County have been promoting agricultural modernization to boost local economy and increase people's income.

A person works at a modern agricultural park in Nanhe County, north China's Hebei Province, April 30, 2020. In recent years, local authorities of Nanhe County have been promoting agricultural modernization to boost local economy and increase people's income.

People work at a modern agricultural park in Nanhe County, north China's Hebei Province, April 30, 2020. In recent years, local authorities of Nanhe County have been promoting agricultural modernization to boost local economy and increase people's income.