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The good old man Gu Bao was kicked back to the first grade classroom of high school in 1993 by fate. He decided to make an end with his previous life and embark on a completely opposite path in this life.

A fifteen-year-old boy with only a black and white view of the world in his heart had no regrets and almost died when he left home for the first time. He fell into the whirlpool of the three major forces fighting for no reason. I want to go home and continue to be a good man, but I am not willing to be a bedbug that gnaws on old age. Where should I go and how should I choose? Can a simple boy withstand the test of a cruel society? Many years later, will the sharp edges, personality, and dreams of those years remain the same? Conspiracies, truth and lies, how to see clearly in this dazzling world. Qing'er, the childhood sweetheart, Linglong, the sister next door... It's so confusing, how to choose? How to choose between Xiaojia and everyone? ...

During the journey, Wan Qing bumped into a person who also traveled through time, and obtained his memory. In order to return to the earth again, he started on the road of invincibility since he was a child.

After physicist Li Xiansen traveled to a different world where martial arts was respected, he established a new practice system and gained the title of invincible.

Wanqing, who was already a king, had no choice but to commit suicide in order to protect hundreds of millions of people, but was reincarnated and resurrected due to a special horoscope. Only after being reborn did he realize how important it is to be invincible. Only invincibility can last forever.