A brief description of the manhua Return Of Immortal Emperor:
Three years ago, Yun Qingyan accidentally fell from the mortal realm into the fairy realm. Three thousand years later, he became the emperor of Yunxian Realm. Breaking through the void, Yun Qingyan returned to the mortal realm and found that it had only been three years. I used to have no strength to protect my beloved, but now I want the whole world to fall under my feet.