Which dynasty painted the ancient purple gas from the East?

During the Spring and Autumn Period, Zi Qi came to the East to describe the story of Laozi's going through the customs.

The word purple comes from the East.

Pronunciation z ǐ q ǐ d not ng lá i

Legend has it that before Laozi crossed Hangu Pass, Guanling let Yin see the purple gas coming from the east and knew that there were saints to pass. Sure enough, I came riding a green cow. This old metaphor is a symbol of good luck.

Used as object and attribute; Include praise

Structural subject-predicate

Synonyms are colorful, clear purple and purple yellow.

Citing the historical records of Lao Zi's Biographies of Han Fei, this paper explains that "Lao Zi wrote a book from top to bottom, leaving more than 5,000 words of meaning, and I don't know the ending." Sima Yi quoted Han and Liu Xiang's Biography of Liexian: Laozi traveled westward, making the shade look purple and floating, while Laozi passed by a green cow. Later, he used "purple gas from the east" to express auspicious meaning. In the Qing Dynasty, Hong Sheng's "Dancing Dish in the Palace of Eternal Life" said: "Purple air comes from the east, Yaochi looks from the west, and the bluebird flutters before the court. "

The source item "Biography of Youxian": "I went west, making the yin see purple and floating customs, and I passed by Qingniu."