The narrator tells us that this is Mr.tao's street. It's a place where all kinds of criminals and gangsters gather. There's also a homeless girl who sells her body for money. The narrator says that the heart of underworld dealings lies in this street, and there's an unspoken rule that whatever happens along the street is decided by the underworld. For example, if you're scared of a "damned girl like you," then you can't be afraid of Mr. tao. He's telling us that if he makes you happy, you'll be more likely to do things the right way.