Normally I get off work at six o'clock, and the leader 17:55 sends a message in the group saying that 18:30 will have a meeting. What should I do?

In the face of this unexpected situation, you can take the following measures:

1. Reply to the leader: Reply to the leader in the group, indicating that you have received the message and will prepare to attend the meeting as soon as possible.

2. Adjust the plan: adjust your work plan according to the change of meeting time. Try to arrange the unfinished work in advance to ensure that it can be completed on time.

3. Communicate with colleagues: If you need to coordinate your work with other colleagues or enjoy resources, communicate with them in time so that everyone can get ready.

4. Quick preparation: Prepare the materials, notes and ideas needed for the meeting as soon as possible. If there is an agenda or related materials published in advance, priority should be given to consulting them so that they can keep up with the discussion process.

5. Communicate in advance: If you can't attend the meeting in time because of the sudden change of the meeting time, communicate with the leaders as soon as possible and put forward reasonable explanations and suggestions to see if you can make adjustments or attend some meetings.

6. Flexible adaptation: In an emergency, flexible adaptation is the key. Try to keep a positive attitude and actively cooperate with the team to ensure the smooth progress of the meeting.

7. Reflection and improvement: After the meeting, reflect on the impact of this temporary arrangement on the work, and think about how to better deal with it in similar situations, so as to take countermeasures in advance.

Whether it is a sudden meeting arrangement or other unexpected situations, flexible response and good communication are the key to solving the problem. Work closely with leaders and teams to attend the meeting in the best condition.