What is the difference between Ye Tan breathing turbid air and Qingkui clear air?

Qingkui is a white flower that produces a steady stream of clean air, while Ye Tan is a black flower that produces a steady stream of turbid air. Yesan and Qingkui are twin sisters. When they were born, Qingkui received a good omen from the sky, and Ye Tan received a bad omen from the sky. Therefore, Qingkui was betrothed to the heaven, and Yesan was betrothed to the devil. During the more than ten years of his growth, Ye Tan was not favored by his father, was locked up in the palace, had neither enough food nor clothing, and suffered harsh treatment from the palace servants. Ye Tan determined to marry into the devil world in the future and become the frightening Shen Yuan. It's evil, but on the wedding day, because he spied on the fight for the Demon Clan's reserve position, His Highness Third Highness Chaofeng changed the sedan chair. In this way, Ye Tan, who was supposed to marry the Demon Clan, got married to the Heavenly Palace by accident. , because he had never learned etiquette since he was a child, he made a lot of jokes in the Tiangong, and even made Shaodian Youqin frequently dislike him. In order to regain his freedom, he worked against Shaodian Youqin, but in the process of getting along, he discovered that Shaodian has a side of Qin that no one knows about.