Land Act Article 54

Any person who has peaceably and continuously taken possession of any land and may, according to the provisions of Articles 769 and 770 of the Civil Code, apply to be registered as its owner shall, during the period of application for registration, file an application for the registration of the ownership of the said land on the testimony of those persons who own the adjacent lands.
中文原文 土地法第54條
和平繼續占有之土地,依民法第七百六十九條或第七百七十條之規定,得請求登記為所有人者,應於登記期限內,經土地四鄰證明,聲請為土地所有權之登記。

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