When the Triad Bosses showed themselves, Jin knew that big trouble was inevitable and that was when the System had recommended Jin to buy up the entire place according to a loophole that was found within the land's contract.
The System duly noted the benefits of procuring the entire land, thwarting the entire plans of what Ong revealed and what Ku Wai, the Vice Head of the Three Eyed Tigers had reported. Fortunately, all of this was possible because Jin was already a co-owner of the Tiangong Shopping District due to the land he possessed. (All thanks to Ming buying it when it was dirt cheap after the Pachinko fire.)
Even as the Ruby Rat Triad Boss was busy showing off his aura, Jin was not bothered by it and was instead contacting the owner of the development lease. And it was none other than Grandma Yuan via the System's communication line.