Since the first part of "Shen Yin", Qinglin has been planning to release the Nine Abyss Hells and liberate the Demon King. She did a lot of bad things during this period, destroying Feng Yin's nirvana and causing the Yuan Shen to gather and disperse. With the help of a trace of immortal yuan, she was reborn as a water condensation beast, only to be destroyed again. As a big devil, Qinglin has a demigod cultivation, and even Lan Feng could not resist her attacks, causing a generation of Heavenly Emperors to fall.
Qinglin took pleasure in marrying trouble, and regarded Hongyi Nine-Tailed Fox as the emperor**, causing the anger of the fairy world. She provoked a war and almost plunged the Three Realms into chaos once again. Qinglin is so powerful that it makes people wonder if the Demon King doesn't make a move, she alone is enough to dominate the entire Three Realms. However, she meets Yuan Qi and is defeated almost effortlessly, revealing that even the most powerful demon cannot resist the protagonist's aura.
Qinglin's sudden offline surprised the audience, although she performed strongly in the play, she easily bid farewell to the audience under Yuan Qi's big move. This sloppy handling is regrettable, and at least the audience should feel her arrogance and fearlessness before the finale. In Xianxia dramas, the character's cultivation is usually linked to the scene, but Qinglin's sudden death seems to violate this law.
Overall, Qinglin's presence in the plot seems to be just to force Feng Yin to return.