The Indebted Son, the Second Brother's Preservation Plan

Traveling to the Tang Dynasty, the system forced me to pay off my gambling debt of thousands of yuan within 72 hours, otherwise - physical castration! I, the number one dude in Chang'an, decided to implement an unprecedented plan: Second brother's safety plan! Turn the brothel into a cash machine, use the prince as a protective umbrella, and use the national debt as a resurrection card. Let the world's wealth, power, and technology all extend my second brother's life!