Three years ago, Yun Qing Yan accidentally fell into the Immortal Realm from the Mortal Realm. After three thousand years, he became the great Emperor Yun of the Immortal Realm. Breaking through the barrier between the two realms, he discovered that only three years had passed. "Before, I was too weak to protect my loved ones. Now, I'll make the whole world bow before me."
It's not good but it's not bad either. I could read it without ever wanting to drop it. The story is slow and the art is not that good though. That aside it's the usual manhua protag who went back in time. Also contrary to the generic trope the mc is never bullied by anybody cause he OP so it's kind of satisfying seeing him beat other people. The female lead is the perfect girl, she isn't overbearing or annoying, she's calm and mature. The ruthlessness of the mc make it quite entertaining as well. It's good to spend free time.