In ancient times, what did purple gas and white light represent respectively? Purple gas to emperor gas? What about white light? thank you

In ancient times, purple is precious, and purple gas refers to auspicious gas, while imperial gas is not common, but it makes sense.

Purple gas refers to auspicious gas, which originated from Liu Xiang & gt's record that Lao Zi Li Erxi went to Hangu Pass, and Guanyin Xi saw purple gas coming from the east, hence the saying that "purple gas came from the east".

And ... "Guang Ya Shi Tian" says: "The name of the Heavenly Palace is Purple Palace." Therefore, the palace where the emperor lived was called the Purple Palace. However, such statements as "the Forbidden City" did not appear until after the Tang Dynasty, while the "Forbidden City" did not appear until after the Ming Dynasty. Obviously, it is not as widely spread and far-reaching as "Purple Gas from the East".

"White light" is more obviously a common auspicious photo in history books. For example, Hui Neng, the sixth ancestor of Middle-earth Buddhism, recorded auspicious things such as "white light soaring into the sky".

In ancient times, auspicious signs often whitewashed peace, courted rulers or made excuses for coups. Therefore, it is possible to explain these auspicious signs in any way. In order to please the emperor, of course, it is possible.