I don't know what industry you do and what training you have received. I said the simplest version. You should ask the leader if he wants to speak first. If they don't, you can start by saying hello to the leaders and colleagues of the company first. Good morning everyone. I'm in the++department. I am honored to be the host of this training. Today, we have the honor to invite++teachers to give us a lecture. ++The teacher is currently (lecturer profile). Ladies and gentlemen, we are lucky enough to listen to the first-class teacher's class, so we should come up with a better state, shouldn't we? Then please all stand up and give the warmest applause to Teacher++.

Conclusion: Let's thank the teacher for his all-out speech with warm applause again.

The specific follow-up depends on how the work is arranged.