I Woke Up as Huo Qubing's Kid

Huo Yuan had been dead for less than three seconds when he came back to life. Huo Yuan: The Underworld's reincarnation department sure works fast. But is this department a little rusty? It's bad enough that I still have my memories. Why did they reincarnate me into ancient times, too?! The moment Huo Yuan opens his eyes, he hears someone say, "The young master is weak from birth. I'm afraid..." Huo Yuan gets it. Someone's in for a rough time. He never imagined that person would be him. He thought he was the only sickly one in the family, but it turns out Huo Shan is his older brother. Great, now there are two sickly ones. Wait... Doesn't that make his father Huo Qubing, the guy who died in his twenties?! Huo Yuan: The Underworld's reincarnation department is really terrible at its job!! Huo Yuan diligently keeps himself alive, while also figuring out how to save his father and older brother. One day, as Huo Yuan runs back and forth between the imperial palace and the Huo residence, he meets the young Crown Prince Liu Ju. Remembering what happens to the crown prince in the end, Huo Yuan once again goes: … Damn heaven, what would it hurt to make things easier for me! Huo Yuan works diligently and tirelessly for the development of the Han dynasty. Then one day, a civil official impeaches him. Civil official: Your Majesty already favors the Wei clan and Huo Qubing. Now you even indulge that man's son. Huo Yuan is so unruly. If you don't discipline him, he'll cause a disaster sooner or later. Wei Qing: His parents can discipline him. You've crossed the line. Liu Che: He's still a child. Liu Ju: You can't even keep your own son in line, and now you're trying to parent someone else's? Huo Qubing: Got a problem with that? Keep one eye open on watch while you sleep tonight. The civil official, forcibly held back so he can't speak: Kids turn out bad because of parents like you! Huo Yuan: The Han dynasty is peaceful again today. Nice. A sickly little boy works hard to save the world. Theme: Building a beautiful Han dynasty together.