Novels of A qian of indigo blue

Upon waking up, Zheng Yi finds himself in an ancient parallel world, only to discover that he has become the shadow of the current Emperor! A shadow, a substitute! Constantly facing the threat of assassination by assassins, being controlled by powerful ministers, or being poisoned by malicious individuals. Fortunately, he obtained the Yin Yang Treasure Mirror, which grants him immortality and endless miraculous uses!