Under what circumstances can you see the sunset?

When there are a lot of dust, water vapor and other impurities in the air, it means that the weather in the west has cleared up or the clouds have split, allowing sunlight to shine through and create a gorgeous orange-red sunset ~ and the weather at that time must be sultry. The kind of sunset you are talking about is an article I learned when I was in elementary school called Huo Shao Yun. Huo Shao Yun usually only appears when it rains heavily, and half of the sky is red