What did the ancients mean by purple gas?

Purple clouds. Zi Xia, considered by the ancients as an auspicious symbol or a treasure of phosgene. Purple gas soothes its stones. -Wei Chao in the Tang Dynasty "Liu Yichuan" The ancients valued purple gas, so the word purple gas was mostly used in architecture. Up to now, there is still a saying that purple gas comes from the east, which means that feng shui is the highest in the house. Purple gas is one of the four stars: Hu, Du Ji, Zi Qi and Song Yue. , collectively called four stars. Purple gas is often combined with Du Ji, Luolou, Song Yue and Lindera as medicinal liquor. Detailed explanation 1. Purple clouds. In ancient times, it was considered auspicious. Collateral meetings are a harbinger of the emergence of emperors and sages. Historical Records Old Feilie Biography "I don't know the end" Sima Zhen quoted the words of China, South Korea and Liu Xiang in "Fairy Biography": "Laozi's westward journey makes the yin see purple gas floating, and Laozi rides a green cow." "Biography of Heather's Empress Liang Wudi Ding Guiqi": "Guiqi was born in Fancheng, and her first birth was different from Shenguang, and she was full of purple." Liang Ming Chen Yu's Ding Jizhi: "The misty clouds are high and the hills are full of purple. Happy to be unified, the car books are the same. " 2. Phosgene that used to be a baby. Biography of Zhang Hua in the Book of Jin: "When Wu was still alive, there was always purple gas between bullfights ... Hua said:" Why is it auspicious? " Huan said,' The sword is deeper than the sky.' Tang Bai Juyi's "Li Dewey Gu Jian" poem says: "White light shines on the sun and the moon, and purple gas exhausts bullfighting." He Ming Jingming's "Watching Wu Jinshi's Sword Dance Song": "Looking south and fighting purple, there is no wave in the East China Sea." As the saying goes, purple gas and Zi Xia gas, the ancients thought that the symbol of Swiss samples or the phosgene purple gas of treasures came from the East, that is to say, that place is a treasure trove of geomantic omen, and Fan Zeng's purple gas is auspicious gas, which indicates the emergence of emperors.