Nanchang has humid subtropical monsoon climate with four distinct seasons. The spring is rainy with sunshine below the normal and average temperature of 16.8 ℃; the rainy season is mainly from April to June, the total rainfall accounts for over 80% of annual rainfall, and most heavy rain and flooding occur during the rainy season. In January, the temperature is usually 3 ~ 9 ℃, in July, the temperature is usually 27 ~ 37 ℃, it is not cold in winter, and is relatively hot in summer. The annual rainfall is between 1,300 to 1,900 mm, and the rainfall is concentrated from April to July (rainy season).