How to surprise your roommate for his birthday?

I'm glad to answer this question for you. My personal views and suggestions on you are as follows. First, you describe how to surprise your roommate on his birthday. First of all, you must be surprised and happy. The first thing is that you should try to make him unhappy. For example, the day before his birthday, you fought with him over a trivial matter. Don't talk to him the next day, and then tell him that you don't want to, don't come back, don't come into this room, and then what? When he goes out, you prepare all kinds of things in the room, such as what this microphone looks like, that is to say, decorate it with balloons, or write some slogans, which you can reach at your fingertips, and then go to one of them and buy him a cake and tell him that I am missing something. This is what you just took. You brought all the people who have seen it. Come back to the house with me and make it clear. Put all the blessing music, words and slogans you have prepared at once so that Wall can see at a glance. This will be his most unforgettable birthday.