I have 28 people who participated in the recitation of "Chinese Dream", and 8 of them led the recitation. How to form a formation?

Fan-shaped, beautiful, and long sound. Q: How many degrees? Answer: Look at the size of the stage. How many microphones are there? Is it multi-directional? Follow-up: Four answers: Use the microphone stand or hold it? Follow-up: Hand-held answer: No, there must be a microphone stand-follow-up: Then tell me about your attention. Answer: Then lead the singer to the chorus-