What do you mean by purple sky?

It indicates that good things will happen.

1, Ziwei refers to Ziwei, which means that you are illuminated by Ziwei, which is a good sign. That is, what you ask can be successful.

2. Ziweixing is one of the three walls (namely Taiwei Garden, Ziwei Garden and Tianshi Garden). Wei Zi is also listed as one of the Four Emperors by Taoism. The purple light symbolizes the meaning of exorcising evil spirits, welcoming blessings and praying for blessings.

3. For houses built by Huizhou people, choose an auspicious day on the beams. When the roof truss is erected, firecrackers and incense sticks should be set off, and at the same time, the words "Wei Zi shines high" should be pasted on the beams.

4. Zhu Yuanzhang wrote the words "Wei Zi shines high". Wei Zixing shines on the earth and all monsters in the world will be suppressed. Wei Zixing is the constellation of the Emperor. People knew that these four words were inscribed by the emperor, so they followed suit in order to augur well.