What is the meaning of opera, opera, and theater? Is there any overlap in concept?

Opera is the collective name for all kinds of dramas of all nationalities in China, so theater includes opera. Drama also includes ballet, folk dance, Western opera, folk opera, drama and so on.

Curricular art is also China's national art, is the collective name of the rap art of various nationalities. For example, Beijing Rhythm Drums, Suzhou Bouncing Words, Comedy and so on.

Conceptually, opera does not overlap with songcraft. However, there are performance forms that are controversial whether they are opera or operatic art, such as the two-man turn, which some consider opera and others consider operatic art (I consider it opera).