Changzhou has a subtropical monsoon climate, and the Tropic of Cancer runs through it. The annual average temperature is 2 1. 1℃, the rainfall is1503.6mm, the annual relative humidity is 78%, and the annual frost-free period is 34 1 day. The land in Changzhou is mainly red loam, which can be divided into three categories: paddy soil, dry land soil and natural soil. Bedrock is the most widely distributed, followed by granite.