It can be introduced as follows:

1 means to express gratitude to leaders, colleagues or friends for their usual care and support.

2. Just introduce yourself briefly, especially what you are good at, such as a hobby, so that everyone can remember themselves and it is convenient for people with the same hobby to ask you out next time.

3, it is to express expectations. I hope that everyone will cherish this fate and become a good group that often gets together.