As I mentioned in my opening statement, the issue is that because of currency controls, it is difficult to move money out of China unless you have approval. It's my understanding things have tightened up in that regard over the last few years.
What you find internationally—and this is not just between China and Canada but in the world generally—is that there are underground bankers. Underground bankers are money service businesses, but they are simply unregistered money service businesses. That's the easiest way of looking at it. They're not registered with FINTRAC in Canada. They are individuals who have a connection one way or another. They may have a family connection, or colleagues, or they may be members of a drug trafficking ring. All they really have to do is send a message from one to the other, between continents, and say, “I've got money. I'm holding money. You can give the money to Mr. A.” No money actually flows back and forth. There are no wire transfers. There is a settling of accounts among the underground bankers at some time in the future, or the money they have received from a client is then sent to a third party, possibly to purchase drugs or whatever.
In answer to your question, what is most likely happening, and most common, is the use of these informal remittance providers known as underground bankers.