Regulations Governing Customs Bonded Factories Article 36

In case any bonded product exported by a Bonded Factory is returned and re-imported by any reason whatsoever, the Bonded Factory shall apply for import clearance for said product by submitting an application for re-import of ordinary goods in accordance with the procedures applicable to the re-importation of ordinary goods. The said product, after entering the Factory, shall be stored in the warehouse for finished products and entered into the account book maintained for finished products.
中文原文 海關管理保稅工廠辦法第36條
保稅工廠出口之保稅產品因故退貨復運進口者,應繕具報單依照一般復運進口貨物進口之規定辦理通關手續,並於進廠後存入成品倉庫並入帳。

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