Code of Civil Procedure Article 333

An interlocutory appeal may be taken from a ruling denying the motion for rejection of an expert witness; a ruling granting such motion is not reviewable.
中文原文 民事訴訟法第333條
拒卻鑑定人之聲明經裁定為不當者,得為抗告;其以聲明為正當者,不得聲明不服。

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