It's not a system, it's not time travel, it's a decisive killing, it's a cool story about a male character who survives and establishes a foundation.
"What do you mean that training is too hard? Don't you want to go south to capture the dragon with my prince and consort?"
"But Your Highness, my horse just starved to death..."
"It doesn't matter. Isn't it okay as long as you don't starve to death? When you follow me back to Tang Dynasty and win the throne, I will compensate you with ten more horses!"
"What did you say? The third prince who was sent to the north to marry the Huns is back?"
"More than just coming back, now Yanmen Pass has been breached!"
"Then what are we waiting for! The empress is ruthless, usurping the throne and causing trouble in the world. Now that the third prince has returned, we should follow him!"
"I am the prince of the Tang Dynasty, and I am leading all the grassland tribes to attack the female thieves! You should put down your weapons quickly, and I will let bygones be bygones."
"Wu Ruyue, when you sent me to get married, did you ever think that I would fight back one day?"
