Financial Holding Company Act Article 38

A Subsidiary of a Financial holding company or an enterprise in which the Subsidiary holds more than twenty percent (20%) of the total issued shares with voting rights or holds Controlling Interest shall not hold shares of the Financial holding company.
中文原文 金融控股公司法第38條
金融控股公司之子公司或子公司持有已發行有表決權股份總數百分之二十以上或控制性持股之投資事業,不得持有金融控股公司之股份。

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