A tourist picks strawberries in a greenhouse at an ecofarm in Shahe City, North China’s Hebei province, Feb 19, 2017. In Shahe, 54 ecofarms has been established to boost economy in villages. [Photo/Xinhua]

A tourist shows strawberries picked in a greenhouse at an ecofarm in Shahe City, North China’s Hebei province, Feb 19, 2017. In Shahe, 54 ecofarms has been established to boost economy in villages.[Photo/Xinhua]

Tourists pick strawberries in a greenhouse at an ecofarm in Shahe City, North China’s Hebei province, Feb 19, 2017. In Shahe, 54 ecofarms has been established to boost economy in villages.[Photo/Xinhua]