1. The plaintiff's appeal is dismissed.

2. The costs of appeal shall be borne by the Plaintiff, including the part arising from the supplementary participation.

1. The reasoning of the court's explanation concerning this case is as follows: "The strike of this case constitutes an illegal industrial action even if the plaintiff presented additional evidence to the evidence that the plaintiff submitted to the court of first instance. The plaintiff's planning, leading, or inducing the strike of this case as a member of D's central dispute response committee constitutes the grounds for disciplinary action under Article 52 (1) through (5) of the Intervenor's Personnel Management Regulations, and the intervenor's disciplinary action on dismissal of the plaintiff against the plaintiff is insufficient to reverse the first instance court's decision that deemed appropriate." Thus, this is cited as it is in accordance with Article 8 (2) of the Administrative Litigation Act and the main sentence of Article 420 of the Civil Procedure Act.

2. Conclusion, the plaintiff's claim of this case shall be dismissed as it is without merit.

The judgment of the court of first instance is just in conclusion, and thus, the plaintiff's appeal is dismissed.