I am an administrative clerk. The company will have a dinner tomorrow, and then have a year-end meeting. Dong Zhu asked me to call the shareholders and tell them what I should say.

You contact them: Mr./Ms. So-and-so, if there is a position, it is called surname+position. I'm XXX from XXX department of the company. Then go straight to the point and tell them that the company will have a dinner tomorrow, and then hold a year-end meeting and ask them if they can attend. If not, roughly ask why. If you can arrive, ask about the time and determine the itinerary. Mark those who are sure to come, those who can't come, the reasons, those who are uncertain and need to contact again. Then report to your leader.