When Laozi left Hangu Pass, was the "Purple Qi" in "Purple Qi Comes from the East" the dense Qi of Taoism?

The purple qi in Purple Qi from the East was not the dense qi of Taoism. This idiom originated from Bai Juyi's Song of Everlasting Sorrow in the Tang Dynasty, which described the love story between Emperor Xuanzong of the Tang Dynasty and Yang Yuhuan. In the novel, purple qi was a mysterious aura that represented good luck and good luck. Later, this phrase gradually evolved into the idiom Purple Qi Comes From The East to describe the arrival of some mysterious force or event. In Taoism, the dense qi referred to the state where the qi of yin and yang interacted and fused. It was also called the dense qi. It was a kind of energy that was full of vitality and vitality. Daoists believed that this energy was the root of all things in the world and could trigger all kinds of wonderful things and phenomena. Therefore, the purple qi had no direct connection with the dense qi of the Taoist sect.