Farmers in Shanting district, Zaozhuang, Shandong province have been building greenhouses to grow fruits and vegetables, which has greatly increased household income.

A farmer picks strawberries at a greenhouse in Shanting district, Zaozhuang, Shandong province on Feb 16. Winter is the best season to harvest strawberries. [Photo/dzwww.com]

Tomatoes ripen at greenhouses in Shanting district, Zaozhuang, Shandong province. [Photo/dzwww.com]

Farmers welcome fig fruit harvest season in Shanting district, Zaozhuang in winter. [Photo/dzwww.com]

Fig trees are grown in greenhouses and hit the market in winter in Shanting district, Zaozhuang. The fruit has a unique taste and texture, with health benefits such as helping lower blood pressure and weight. [Photo/dzwww.com]

Freshly-picked strawberries are packed at the greenhouse base in Shanting district, Zaozhuang. [Photo/dzwww.com]

A farmer picks strawberries at the greenhouse. [Photo/dzwww.com]

A farmer picks tomatoes at the greenhouse. [Photo/dzwww.com]