When you write a Chinese financial letter you need to put special attention to disposition of the text in it.
Your business contact will reply quickly if your letter sounds more Chinese.
Indentions requirements and placing the colon in your greeting, the set of words in the first phrase can shape the correct financial letter to your Chinese business partner.
You will find some examples the Chinese financial letters and emails in the Chinese financial correspondence textbook for self-study
“Supersonic Price Chinese Book 1” by Polina Shinkina