Chongqing belongs to sub-tropical monsoon climate. The features are warm winter, hot summer, early spring and short autumn. Annual average temperature is around 19.2 centigrade degree. The average lowest temperature is 6-8 centigrade degree in winter. The average highest temperature is 27-38 centigrade degree in summer and the extreme temperature can reach as high as 43.8 centigrade degree. Hence it had got the name of ‘furnace city’.