What does it mean that my girlfriend sent me a ring to see it?

It means that she has decided that you are engaged, so she puts a ring on her left ring finger and tells others that she is married. Marry her early. The ring should be worn on your left hand, and so should you. If you wear it on your right hand, it may be a decorative ring, which is meaningless (except that some people who don't know the meaning of the ring will wear it casually). .