Read the answer to the weather by observing the clouds.

1. Look at the brilliant phenomenon of clouds and know the weather and related proverbs.

2. "Halo" is the aperture of (internal infrared violet).

"Hua" is the aura (inner ultraviolet red).

China has grown from small to large, and the weather tends to be fine. China is changing from big to small, and it may rain.

4. Explain that this has been tested by people's practice and is a summary of life experience, thus leading to the following, enhancing the persuasiveness of the article, highlighting the theme, and writing the article vividly and concretely.