At present, the rules for singing the national anthem are as follows, but there are no rules for international songs.

In other words, you can definitely use the Internationale. You use the national anthem, and there is no express provision for it. But if your QQ space is healthy and civilized, no one will bother you if you use it. It's like someone writing a boycott of Japanese goods in his car. There are no rules, but the police will advise you to take it.

(1) The national anthem can be played and sung on the following occasions

(l) At the beginning of an important celebration or political public meeting

(2) At the beginning of a formal diplomatic occasion or a major international gathering;

(3) struggling to safeguard national dignity.

(two) under the following circumstances, the national anthem shall not be played:

Private weddings and funerals

(2) Balls, social gatherings and other recreational activities

(3) commercial activities.

Your situation is not a private wedding, funeral and celebration, so it should be no problem.