Courtyard House: A Start with Black Gold Swallowing 100,000 Silver Dollars

Transmigrating to a traditional courtyard house in a chaotic, cannibalistic world! Bound to a zero-dollar shopping system, I start by emptying my enemy's pockets of 100,000 silver dollars worth of opium. Before Qin Huairu and Sha Zhu even appear, I first have to fight my beastly neighbor, then swindle the Japanese and traitors. I wanted to just survive until the main story begins, but this damn system is making me rich through zero-dollar shopping? Fine, I'll set a small goal first: empty the entire city of Beijing and become the wealthiest hidden man in the world!