Longevity: Starting from Being an Undercover Agent in the Demon Sect

The time traveler Li Changsheng possesses the "Good and Bad Early Warning Panel". In order to pursue absolute immortality, he is forced to work as an undercover agent in the "Blood Evil Sect", the most ruthless and cruel demon sect in the world of cultivation. On the surface, he is a submissive disciple, but secretly he is the mastermind behind both good and evil.