The distribution law of precipitation in China, and its influence on houses, people's diet and folk customs is illustrated with examples.

The distribution law of precipitation should be answered from two aspects, one is the spatial law, and the other is the temporal law. The distribution law of precipitation in China is that precipitation decreases from southeast to northwest, with more in summer and autumn and less in winter and spring.

Houses: Houses in the south have steep roofs, which are good for drainage. The houses and dance halls in the north have a small slope. There are many precipitation and rivers in the south, and houses are mostly built by the river, which are distributed in strips, while houses in the north are mostly polygonal or irregular.

Diet: There is more water in the south, so rice and fish produce more. People eat more rice and fish. There is less water in the north, so more wheat is produced, and people mainly use pasta.

Folklore: There are dragon boat races and water splashing festivals in the south, and dry boats in the north. Southerners are good at water, but northerners are not. Southerners have tender skin, while northerners have rough skin.