Invincible Little Uncle

(Invincible, everyday, easy) Li Changqing has become stronger every day since time travel. As time goes by, he has become the most powerful person in the world before he knows it. No matter what enemy he is, he can kill him with one punch. If one punch doesn't work, just use two punches. As soon as he traveled through time and landed on the Demon Sect's territory, he knocked everyone down and became the most powerful elder in the Demon Sect's history. However, one day while he was sleeping, the Demon Sect was jointly destroyed by the six sects of the Righteous Path. Li Changqing suddenly remembered that he had rescued a righteous undercover boy named Ye Lingyun many years ago, so he got up and went to Qingxuan Sect where Ye Lingyun was, and then the gears of fate began to turn. My name is Li Changqing, I am the invincible junior uncle of Qingxuan Sect and the most powerful person in the world.