bank transfer coordinates什么意思？求帮助

一个法国客户本打算用西联付款，但是他最多只能付500欧元。所以改用bank transfer.今天他回复邮件说，so i make a bank transfer and you transmit elements (transfer order) of my bank，transfer order是什么意思？ 他还说is that the coordinates for a bank transfer coordinates are different from western union? a bank transfer coordinates指什么？求高手帮助。