Yiwu is located in the geographical center of Zhejiang Province. It belongs to subtropical monsoon climate, with four distinct seasons and rich light and heat resources. In the same period of rain and heat, the annual average temperature is about 17℃, the highest in July is 29.3℃, and the lowest in 1 month is 4.2℃. The average annual frost-free period is about 243 days. The annual average precipitation is1100-1600 mm, and the annual average sunshine is 2 129.7 hours.