Regulations Governing the Collection of Fees for Mediation of Contract Performance Disputes for Cases Concerning Promotion of Private Participation in Infrastructure Projects Article 13

If a mediation procedure is withdrawn in writing, the mediation fee prepaid by both parties shall not be refunded.Notwithstanding the foregoing, if a mediation application is withdrawn in writing before the date of the first mediation session, the applying institution (entity) shall be refunded half of the prepaid mediation fee referred to in the preceding paragraph without interest, and the other party shall be refunded the full amount without interest.
中文原文 促進民間參與公共建設案件履約爭議調解收費辦法第13條
調解程序經書面申請撤回者,雙方當事人所預繳調解費不予退還。
前項預繳調解費,於第一次調解期日前以書面撤回調解者,申請機關(構)無息退還二分之一;他方當事人無息退還全額。

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