Abstract: 1. The geographical location and the sources of the data. 2. The causes of the precipition: a. Cyclone. b. Typhoon. c. Heat thunderstorm. d. Tupography. 3. The geographical distribution of the precipitation(annual and monthly). 4. The seasonal distribution of the precipition. 5.The variablity of the precipitation and the seasonal weather fore-casting. 6.The maximum rainfall in 24 hours. 7. Thc rainy days 8. The regional types of the precipitation: A. Tite coastal region. 1. Islands. 2. Yangtze Estuary. 3. Hangchow Bay. B.The NW of Tai-hu. C. The SW of Tai-hu