Anhui locates in the transitional area between temperate zone and subtropical zone so the climate here is warm and moist, and the four seasons are distinct. The north area to the Huaihe River possesses the half-moist monsoon climate of warm temperate zone while the south area to Huaihe River possesses the subtropical moist monsoon climate. The annual average temperature of the province is 14℃-17℃, the average sunshine lasts 1800-2500 hours, the average frost-free period reaches 200-250 days and the average precipitation remains 800-1800mm per year.