Company Act Article 369-2

I.A company which holds a majority of the total number of the outstanding voting shares or the total amount of the capital stock of another company is considered the controlling company, while the said another company is considered the subordinate company.II.In addition to the relation set forth in the preceding Paragraph, if a company has a direct or indirect control over the management of the personnel, financial or business operation of another company, it is also considered the controlling company, and the said another company is considered the subordinate company.
中文原文 公司法第369-2條
公司持有他公司有表決權之股份或出資額,超過他公司已發行有表決權之股份總數或資本總額半數者為控制公司,該他公司為從屬公司。
除前項外,公司直接或間接控制他公司之人事、財務或業務經營者亦為控制公司,該他公司為從屬公司。

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