Night attack feng shui collar

I study geography in high school. I remember that Daba Mountain is located in the west of China. Bashan for short. In a broad sense, Daba Mountain refers to the mountainous area across the borders of Sichuan, Shaanxi, Gansu and Hubei provinces. It is 1000 km long. It is the boundary mountain between Sichuan Basin and Hanzhong Basin. In a narrow sense, Daba Mountain is the watershed between Hanjiang River and Jialing River, passing through the east of the valley and bordering Sichuan, Shaanxi and Hubei provinces, with an altitude of1300 ~ 2000m ". The biggest feature of Bashan is that it rains at night. When you ask about the untimely return date, it rains at night in the autumn pool. When * * * cut the candle at the west window, but talk about the rain at night. This is a description of Bashan natural environment written by Li Shangyin to a friend in the north on a rainy night. Why is there "late rain"? This is inseparable from the local topography and climate characteristics. Sichuan basin is surrounded by mountains. In autumn, the subtropical air mass retreated slowly, even in a quasi-static state. Therefore, there are many clouds and continuous autumn rains. Why does it rain here at night? This is the influence of specific terrain conditions. There are dense clouds here. Under the protection of clouds during the day, the radiation at the bottom and ground of clouds is weakened and will not be converted into rain. At night, the upper part of the cloud becomes cold rapidly, and the lower part is still warm, so convection occurs and night rain forms. Because of the majestic mountains, criss-crossing gullies and abundant pine and bamboo, many ethnic groups such as Han, Hui, Miao and Man have lived here for generations. Unique natural conditions form a special humanistic environment. Among the people, there have been many kinds of cultural activities to entertain themselves since ancient times, among which Zhenba folk songs have the greatest influence. For years, the dawn of Zhenba has been accompanied by this simple and primitive folk song. Farmers living here start farming and grazing before dawn every day. Folk songs are compulsory courses for them after work, and they are the truest emotional expression in their hearts.