In fact, every assassin organization has its strict confidentiality, even a small-scale assassination organization like Seven-Kill, finding its leader is not so simple.
Firstly, when they issue tasks, you can't even meet anyone; they simply send a short message with the target's details to the assassin's cell phone and it's done.
And when the assassins receive their payment, it's all done through online banking transfers. However, you simply can't trace the specific name or location tied to the card number – that's what's so fearsome about assassins.
In today's developed society, these organizations are even more terrifying because they all have high-tech capabilities, making them even more covert.
Now, Xiang Yu has Wang Ze issue a task, actually hoping to take the opportunity to find the other party's vulnerability. No matter the organization, no matter how watertight it may be, there's always the possibility of an oversight.