Hello cousin
Have a good day!
Welcome you to our family, but I have to tell you somthing, which annoys me deeply.
I hope you can turn voice down when listening to music, for the loud noise disturbs my study.
And I hope you can tidy your room, for it is often dirty and out of order. Besides, I hope you can do some home chores, if my parents are busy. In allI hope we can get on well with each other, and you can have a good time here.
Yours Sincerely
------ 够简单吧