I think it depends on your seat position and the requirements of the conference. If you are in front or on the side of the road, that is, where you may be photographed, you will be more formal and don't have to wear professional clothes. Something simple will do. If the location is average, you can wear student clothes, but it must be simple and generous, and the colors should not be too bright, which makes people feel comfortable and tidy.

Special note: If it is straight hair, you can put it down, but if it is a perm, you must tie it up. You must wear socks when you wear a skirt.

In addition, you can ask the person who invited you to the meeting if there is a dress code on the list he received.