Writing business letters in Chinese is pretty simple if you have the examples of such letters. Supersonic Commercial Chinese Book 1 by Polina Shinkina will reduce the time you spend on business letters writing.
This textbook contains samples of short business letters in the Chinese language which can make you more productive, be short and to-the-point in your correspondence.
The Chinese business letters in Supersonic Commercial Chinese Book are good for your career prospects and will help to write business letters clearly and concisely, be understandable to your Chinese conversation partner and will keep your projects moving faster.
More information you can find in Supersonic Commercial Chinese Book 1 by Polina Shinkina http://www.lulu.com/content/e-book/supersonic-commercial-chinese-book-1/18827988 and http://www.lulu.com/spotlight/polina985