how to sounds "soft" in business letter
I'm working for joint venture in China(I'm a Chinese).
I'm an assistant and I'm responsible for contacting sellers on purchasing.
Recently, my boss has told me more than once that when I'm writing a letter I should be more "soft" and I should use proper English not correct English.
In fact, I use "please" "could you" "would you" "thanks"....a lot to try to sound polite but it seems doesn't work.
Could you please help me on this issue?
Many many many thanks!!!!