My friend is getting married. I don't know what gift to give.

It depends on what kind of friends they are. If ordinary friends send bedding, if it is particularly good, send a memorable and special one. Shanghai Oyugali Industry now has an air purifier, which can be used as an artistic photo frame. It can put their wedding photos in it, which is both beautiful and practical. I'm sure your friends will like it. I have pictures here for your reference.