when mailing my China visa app to Vancouver how do I submit payment?

So, that is application by post to CVASC. After getting the visa from Chinese consulate, the center will call you and give your pick-up form number, the center's bank account and exact amount of fees that you need to be transferred. Then, make payment by Online Bill Payment if you have a BMO Bank of Montreal bank account or by the teller at any BMO Bank of Montreal branch.
Once the full payment has been made, the Center will return your passport by post.