Regulations Governing Securities Investment and Futures Trading in Taiwan by Mainland Area Investors Article 27

When an Institutional Investor exchanges, converts, or subscribes to securities of a Taiwan issuing company under Article 24, it shall be deemed an inward remittance of investment capital, and the custodian institution shall enter it into the account books specified in Article 21, and within five days report it to the competent authority for foreign exchange business, and at the same time provide the information to the TWSE for registration.The amount of an inward remittance pursuant to the preceding paragraph shall be added into the calculation of the total amount of investments made in Taiwan securities by the investor.
中文原文 大陸地區投資人來臺從事證券投資及期貨交易管理辦法第27條
機構投資人依第二十四條規定交換、轉換或認購臺灣地區發行公司有價證券,視為投資本金之匯入,保管機構應登載於第二十一條規定之帳冊,並於五日內向外匯業務主管機關申報,同時將資料提供予證券交易所登錄。
依前項規定匯入之數額,計入原投資臺灣地區證券之額度。

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