Commercial Case Adjudication Act Article 12

If the parties or related parties, interveners or participants fail to retain agents ad litem, as they are required, or if the retained agent ad litem fails to be present in court, all the parties are deemed as absent in court.
中文原文 商業事件審理法第12條
當事人或關係人、參加人或參與人應委任程序代理人而未委任,或委任之程序代理人未到場者,視同不到場。

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