Su Wen's thoughts were simple. He needed information!
No matter what era it is, intelligence was always important.
He was even very sure that Su Changqing had his own source of information.
However, establishing his own intelligence network was not an easy task for Su Wen.
Because that would require too much manpower and would cost a lot.
However, these three gangs were different. They had all sorts of people and were very well-informed. Although most of the people they interacted with were people of low status, they could still obtain a lot of useful information.
Such information was useless to them but it might be useful to Su Wen.
This was also the reason why Su Wen paid a discount compared to normal intel gathering. Of course, the accuracy and authenticity of the information would be 'discounted' as well.
But it was better than nothing.