Let me ask you a question. Can coser pictures taken in comic exhibition be posted online?

You can post it on the internet. Usually these pictures can only be called live photos, not front photos.

Ask coser's permission when taking pictures. Once coser agrees, those pictures can be posted to the post bar, which is called returning pictures. Many Cosers also hope to receive many returned pictures at the end of the exhibition. You'd better have a little p before you send them.