Dear XX: I Iam Wang L I am writing this letter to you to complain about the XX thing, for which I happen to feel (sorry / annoyed) (for reasons) Unfortunately, (apology / reason why) But, anyway, (my remedy / want solutions given each other) I hope it does not cause you too much I really hope you can XX, and I really hope you can XX, and accept my (apology / opinion) Hope to get your reply as soon as A sincere friend Wang Lin