How about opening another account in Canadian banks? I think some schools only take Canadian funds from Canadian banks.
Many Canadian banks have branches in China. The only disvantage of money order is that if it's lost in the mail, it will be gone. I don't trust Canada Post much, maybe you can try courier service to deliver it.
我申请留学签证,已经体检完毕,请问大概需要多少时间能拿到签证结果? 没有签证,中国银行不能兑换外币,而现在学校需要在8月初提交first installment fees(about $4500),我该怎么办?