Act Governing Relations between the People of the Taiwan Area and the Mainland Area Article 62

The legal requirements for making or revocation and the legal effects of donation by any of the people of the Mainland Area shall be subject to the provisions of the referred Area; provided, however, that the donated property located in the Taiwan Area shall be subject to the laws of the Taiwan Area.
中文原文 臺灣地區與大陸地區人民關係條例第62條
大陸地區人民之捐助行為,其成立或撤回之要件及效力,依該地區之規定。
但捐助財產在臺灣地區者,適用臺灣地區之法律。

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