Code of Civil Procedure Article 369

Where the action has been initiated, the motion for perpetuation of evidence shall be made in the court in which the case is pending; where the action has not been initiated, such motion shall be made in the district court at the place either where the person to be examined domiciles/resides or where the tangible evidence is located.In urgent cases, a motion for perpetuation of evidence may be made, even if the action has been initiated, in the district court provided in the preceding paragraph.
中文原文 民事訴訟法第369條
保全證據之聲請,在起訴後,向受訴法院為之;在起訴前,向受訊問人住居地或證物所在地之地方法院為之。
遇有急迫情形時,於起訴後,亦得向前項地方法院聲請保全證據。

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