A farmer harvests blueberries at a blueberry cultivation base in Chengde, north China's Hebei Province, July 16, 2017. Commercial blueberry and raspberry plantings have been introduced into Hebei in recent years. (Xinhua/Wang Liqun)
A farmer harvests blueberries at a blueberry cultivation base in Chengde, north China's Hebei Province, July 16, 2017. Commercial blueberry and raspberry plantings have been introduced into Hebei in recent years. (Xinhua/Wang Liqun)
Blueberries are seen at a blueberry cultivation base in Chengde, north China's Hebei Province, July 16, 2017. Commercial blueberry and raspberry plantings have been introduced into Hebei in recent years. (Xinhua/Wang Liqun)
Farmers harvest blueberries at a blueberry cultivation base in Chengde, north China's Hebei Province, July 16, 2017. Commercial blueberry and raspberry plantings have been introduced into Hebei in recent years. (Xinhua/Wang Liqun)
A farmer harvests blueberries at a blueberry cultivation base in Chengde, north China's Hebei Province, July 16, 2017. Commercial blueberry and raspberry plantings have been introduced into Hebei in recent years. (Xinhua/Wang Liqun)
Farmers select blueberries at a blueberry cultivation base in Chengde, north China's Hebei Province, July 16, 2017. Commercial blueberry and raspberry plantings have been introduced into Hebei in recent years. (Xinhua/Wang Liqun)