Land Act Article 109

Any farm lease contract for a definite period shall, unless the lessor takes back the land for his own cultivation on the expiration of the contractual period, be deemed to have been renewed for an indefinite period, if the lessee continues to cultivate the said land.
中文原文 土地法第109條
依定有期限之契約租用耕地者,於契約屆滿時,除出租人收回自耕外,如承租人繼續耕作,視為不定期限繼續契約。

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