I think playing mobile phones in the library is a sign of disrespect for this environment, because the existence of the library is to let more people have a quiet and tidy environment to read and really study, rather than playing mobile phones in the library. If you really have some needs, I think this is completely understandable, but it is not civilized for you to play with your mobile phone, let alone eat. It is forbidden to bring food into the library, not even our classroom, not to mention the library, a public place with high environmental requirements. I think this is very immoral and unqualified behavior.