《商业书信》是应对外经济贸易大学和中央人民广播电台联合举办的《广播函授国际商业英语课程》的需要，受对外经济贸易大学继续教育学院的委托而编写的。
这本教材共45课，涉及久贸业务的询盘、发盘、还盘、接受、付款、装运、索赔等基本业务环节，选材力求实用，文字力求规范、简练习。为帮助自学，教材还有四个附件：销售确认书、食用证样例、练习参考答案和课文参考译文等。
Lesson 1 Communication and Business
Lesson 2 Letter——A Common Communication Medium
Lesson 3 Business Letter-Writing
Lesson 4 Clarity，Conciseness，Courtesy
Lesson 5 Structure of Business Letter
Lesson 6 Letter Styles
Lesson 7 Seeling Friends through the Bank
Lesson 8 Seeling Friends through chamber of commerce
Lesson 9 Credit Inquiry
Lesson 10 Reply to Credit Inquiry
Lesson 11 Trade Reference
Lesson 12 Credit Information
Lesson 13 A Letter to a japanese Exporter
Lesson 14 A reply to the Letter in Lesson Thirteen
Lesson 15 Asking for Catalogues
Lesson 16 Sending Catalogue and Price List
Lesson 17 A Specific Samples
Lesson 18 Sending Samples
Lesson 19 An Offer Without Engagement
Lesson 20 A Firm Offer
Lesson 21 Proforma Invoice
Lesson 22 Goods (Supplied)on Approval
Lesson 23 An Order
Lesson 24 Acknowledging an Order
Lesson 25 Selling Substitutes
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Appendix I A Sles Confirmation
Appendix II A Letter of Credit
Appendix III Key to Exercises
Appendix IV Chinese Versions of the Texts
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