First of all, it is technically possible. You can download it from 360 Music Network. The URL is: /bell/32370.html

Secondly, I think it is best to set the national anthem as a mobile phone ringtone. Not only is it possible, but it is worth promoting. Letting our national anthem sound at any time is a sign of patriotism and there is nothing disrespectful about it. It can also enhance our sense of patriotism. I think your will is good.

However, the national anthem may not be solemn enough on certain occasions, so please be aware.