I appreciate your efforts and cooperation and hope that this will be the forerunner of other transactions in future.
非常感谢贵方的努力与合作,希望这只是我们今后业务往来的开端。
If you want to send a letter to an office abroad that is in a different time zone, you can send a fax, and it will be received even though the office is not open.
如果你要寄信到不同时区的国外办公室,你可以发个传真,即使办公室不开门,信也会被收到。