Regulations Governing Permission and Administration of Securities and Futures Business Dealings and Investment Between the Taiwan Area and the Mainland Area Article 37

When a Mainland-area securities or futures institution or a Mainland-invested securities or futures institution undertakes equity investment in a Taiwan-area securities or futures institution, the total amount of cumulative investment and holdings by any such individual institution in any single Taiwan-area securities or futures institution listed on the Taiwan Stock Exchange (TWSE) or Taipei Exchange (TPEx) may not exceed 5 percent of the total issued voting shares or total authorized capital; the total amount of cumulative investment and holdings by all such institutions in any single Taiwan-area securities or futures institution listed on the TWSE or TPEx may not exceed ten percent of the total issued voting shares or total authorized capital.When a Mainland-area securities of futures institution or a Mainland-invested securities or futures institution undertakes equity investment in a Taiwan-area securities or futures institution, the total amount of cumulative investment and holdings by any such individual institution, in any single Taiwan-area securities or futures institution not listed on the TWSE or the TPEx, may not exceed 10 percent of the investee's total issued voting shares or total authorized capital; the total amount of cumulative investment and holdings by all such institutions in any single Taiwan-area securities or futures institution listed on the TWSE or TPEx may not exceed 15 percent of the investee's total issued voting shares or total authorized capital.
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37條
大陸地區證券、期貨機構或陸資證券、期貨機構參股投資臺灣地區證券、期貨機構,其個別累計投資持有單一臺灣地區上市或上櫃證券、期貨機構已發行有表決權股份總數或資本總額,不得超過百分之五;全部累計投資持有單一臺灣地區上市或上櫃證券、期貨機構已發行有表決權股份總數或資本總額,不得超過百分之十。
大陸地區證券、期貨機構或陸資證券、期貨機構個別累計投資持有單一臺灣地區未上市或未上櫃證券、期貨機構已發行有表決權股份總數或資本總額,不得超過百分之十;全部累計投資持有單一臺灣地區未上市或未上櫃證券、期貨機構已發行有表決權股份總數或資本總額,不得超過百分之十五。

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