Based on our years of cooperation and our mutual trust, we offer (具体账期）payment term. Actually, according to our financial rule, we only offer 15 days payment term for customers whose annual purchase amount is above USD$300,000 (这个目前没有具体标准，只是一个大致金额）.

As a support and based on mutual trust, We specially apply (具体账期） payment term for 客户公司名称. Hope you can understand and pay the bill as soon as possible, thanks for your cooperation.