Consumer Protection Act Article 22

Traders shall ensure the accuracy of the contents of advertisements and be under the obligations not to provide less than what is stated in the advertisements.After the contract is made and entered between traders and consumers, traders shall fulfill the contents of the advertisements of goods or services.
中文原文 消費者保護法第22條
企業經營者應確保廣告內容之真實,其對消費者所負之義務不得低於廣告之內容。
企業經營者之商品或服務廣告內容,於契約成立後,應確實履行。

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