Do they want us to courier every invoice to them in future, we will if that is what they require, it just that it does seem an unnecessary expense as I am sure you understand.

• 他们是否想让我们以后都将发票邮寄于他们，如果他们有要求的话我们会照做的，只是觉得这些会产生一些不必要的开支，我想这你也能理解。