Why does it often rain in Changzhou, Jiangsu?

Changzhou is located in the south of Jiangsu Province, in the lower reaches of the Yangtze River, with latitude 3 1000 '-32004' and longitude119008'-120012'. Changzhou is located in the beautiful and rich Yangtze River Golden Triangle area, facing Shanghai, Nanjing and other places, connected with Suzhou and Wuxi, forming the Suzhou-Wuxi metropolitan area. Changzhou enjoys a superior geographical position and convenient land, sea and air transportation conditions. The urban area is adjacent to the Yangtze River in the north and Taihu Lake in the south, and the Shanghai-Nanjing Railway, Shanghai-Nanjing Expressway, National Highway 3 12 and Beijing-Hangzhou Grand Canal pass through it. The city's water network criss-crosses, connecting rivers and oceans. As a national first-class open port, Changzhou Port of the Yangtze River has an annual cargo throughput of over one million tons. Changzhou Railway Station has air routes to more than 20 large and medium-sized cities in China, including Beijing, Guangzhou, Dalian, Xiamen, Shenzhen, Haikou and Xi 'an. The landform of Changzhou is characterized by high sand plains and flat mountainous areas, Tianmu Mountain in the south, Maoshan Mountain in the west, Ningzhen Mountain in the north, and vast plains and good areas in the middle and east. The territory is slightly higher in the southwest and lower in the northeast, with a difference of two meters from left to right. After the water on the earth is irradiated by sunlight, it becomes steam and is evaporated into the air. Water vapor condenses into small water droplets when it meets cold air at high altitude. These small water droplets are very small, with a diameter of only 0.0 1 ~ 0.02 mm and a maximum of only 0.2 mm ... They are small and light, and are held up in the air by the updraft in the air. It is these small water droplets that gather in the air to form clouds. These small water droplets will become raindrops and fall to the ground, and the volume will increase by about 1 10,000 times. It mainly relies on two means, one is condensation and sublimation. The second is to rely on the collision and increase of cloud droplets. In the initial stage of raindrop formation, cloud droplets mainly condense and condense themselves by constantly absorbing water vapor around the cloud. If the water vapor in the cloud can be constantly replenished and replenished, so that the surface of the cloud droplets is often in a state of supersaturation, then this condensation process will continue, making the cloud droplets grow and become raindrops. However, sometimes the water vapor content in the cloud is limited, and in the same cloud, the water vapor is often in short supply, so it is impossible to make every cloud droplet grow into a larger raindrop, and some smaller cloud droplets have to be merged into a larger cloud droplet. If there are water droplets and ice crystals in the cloud, the process of condensation and sublimation will be greatly accelerated. When the cloud drops increase to a certain extent, due to the increasing volume and weight of large cloud drops, they can not only catch up with the slower small cloud drops, but also "swallow" more small cloud drops, making themselves stronger. When the big cloud drops get bigger and bigger until the air can no longer hold them, they fall straight from the clouds to the ground and become our common rain. If you are satisfied with my answer,

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