Code of Civil Procedure Article 57

Each co-party has the right to continue the action.Prior to designating a court session, the court shall notify all co-parties to appear.
中文原文 民事訴訟法第57條
共同訴訟人,各有續行訴訟之權。
法院指定期日者,應通知各共同訴訟人到場。

English translation for reference only; the Chinese text prevails. Not legal advice.