Regulations Governing Customs Clearance for Importation of Advertising Matter and Samples Article 8

Imported samples may proceed with pre-entry declaration and submit import declaration form to the Customs for review in advance. A declaration form marked with a stamp of “Samples for early processing” gives a priority higher than regular imported goods and will be processed rapidly.
中文原文 廣告品及貨樣進口通關辦法第8條
進口貨樣得預行辦理報關手續,並得先將進口報單送海關核明,在報單上加蓋「貨樣提前辦理」戳記,優於一般進口貨物,迅速處理。

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