Just imagine the bike is in somebody else's name and you happen to have an accident or do something really wrong. The former owner to save his ass could say, for example, that you stole the bike from him, which will add into whatever wrong happened. Unless you leave the scene like a bat out of the hell, which would make it even worse, specially if you get caught. in this possible scenarios you will end up doing time in a chinese prison. I don't know, to me, riding illegally is just not worth it. I wouldn't do it in my own home country and certainly I wouldn't do it here, but many people don't give a sh:::t about it, mainly because they are unable to see the consequences, or they don't care, disrespect or simple ignorance...