An aerial photo taken on Aug. 29, 2018 shows a photovoltaic power plant in Lejiao village in Hengshui, North China's Hebei Province. In recent years, Hengshui has encouraged to establish photovoltaic power plants in poverty-stricken villages to help the local poor improve income. (Photo: Xinhua)

An aerial photo taken on Aug. 29, 2018 shows a photovoltaic power plant in Lejiao village in Hengshui, North China's Hebei Province. In recent years, Hengshui has encouraged people to establish photovoltaic power plants in poverty-stricken villages to help the local poor improve income. (Photo: Xinhua)

Staff members patrol a photovoltaic power plant in Lejiao village in the city of Hengshui, North China's Hebei Province, Aug. 29, 2018. (Photo: Xinhua)

An aerial photo taken on Aug. 29, 2018 shows staff members patrolling a photovoltaic power plant in Lejiao village in Hengshui, North China's Hebei Province. (Photo: Xinhua)