Person: host; Guests (the class teacher is invited if it is held internally, and the secretary, dean and vice president are invited if it is at the college level).

Materials: microphone, stereo, PPT, mineral water (for guests or for each classmate if possible), introduction card (for introducing guests, write down the names of guests, and be careful not to typo) (snacks can be prepared for small welcome parties, but not for large ones), and activity flow (printed for guests to see).

I wonder if it will help you to think so much for a while.