Regulations Governing Permission and Administration of Securities and Futures Business Dealings and Investment Between the Taiwan Area and the Mainland Area Article 38

When a Mainland-area securities or futures institution or a Mainland-invested securities or futures institution makes equity investment in a Taiwan-area securities firm, SITE, or FCM, the lines of business which the Taiwan-area investee may apply to operate will be separately prescribed by the competent authority.
中文原文 臺灣地區與大陸地區證券期貨業務往來及投資許可管理辦法第38條
大陸地區證券、期貨機構或陸資證券、期貨機構在臺灣地區參股投資之證券商、證券投資信託事業或期貨商得申請經營之業務項目,由主管機關另定之。

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