http://www.bagu.cc/
I bought a new book named English Business Communication and Documentation recently and want to make a review of business writing in case I’ve forgotten the knowledge when it is required.
　　
　　7Cs principles:
　　clearness 清楚
　　conciseness 简洁
　　consideration 周到
　　courtesy 礼貌
　　concreteness 具体
　　correctness 正确
　　completeness 完整