Brother is not the villain
Summary
The second generation of rich and wealthy Xiong Yang traveled to ancient times in a football match! I thought I could inherit his father’s billions of assets like before crossing, but I didn’t expect to devote himself to a prodigal son with the same name and surname. read at https://www.youtube.com/channel/UCvqSfaWq5qcrCWYisRfSEnw/ I accidentally stepped on the thigh of the emperor. I thought I would be an official in this dynasty to earn a little money and power to share the prosperity of the world, but I was driven by ducks to the shelves and made remarkable achievements. I was witnessing this country with my own eyes. After avoiding catastrophe with his own efforts, he turned his destiny and determined to do something great for the future.
In a system like that there would need to be rigorous documentation and certificates of prior ownership/guardianship or else anyone and everyone would just get grabbed off the street and enslaved at any time, and such a society would collapse instantly. So these slavers wouldn't have such documentation unless it was a forgery since the kids were just kidnapped; both offenses should be very serious capitol crimes. Once again, the day is saved by glorious Bureaucracy! (and the MC's knowledge and exploitation there of).