Mario did something absolutely unbecoming of his status, and something Gao Yang should absolutely never do with his identity.
Inviting someone to your home, only for it to be a banquet of betrayal; the consequences of such actions would be grave.
There are two types of people you should never owe money to: intelligence brokers and mercenaries. The former controls too many secrets, and the latter represents the ultimate force. Therefore, the consequences of offending these two types are never pleasant. Of course, there's a premise: they must be strong enough. An intelligence broker with no resources clearly won't be taken seriously, and no one worries too much about a feeble mercenary.
If owing money is already unacceptable, then more serious actions are certainly out of the question.
Now comes the problem: Mario is undoubtedly the most formidable intelligence broker, while Gao Yang is the fiercest mercenary, with the strongest mercenary group.
