Is the elegant China Calligraphy Cup formal?

No, the elegant Korean Cup should be a cultural and knowledge exchange activity organized by the people spontaneously. Its form is roughly similar to the competitions or activities of some students or amateurs, and it is not included in the management of official institutions or large-scale events, so it is not a regular event. I suggest you carefully understand and evaluate the relevant information to determine whether the competition is suitable for you. At the same time, participating in the competition can also be a way to grow and exercise self-ability, which can increase one's experience and skills.