Company Act Article 54

I.A shareholder, without the unanimous consent of all other shareholders, shall not be a shareholder of unlimited liability of another company or a partner in a partnership business.II.A shareholder who conducts business of the company, shall not, on his own account or on behalf of another, engage in the same business as that of the company.III.In case a shareholder who conducts business of the company violates the provisions of the preceding paragraph, all other shareholders may, by a majority of vote, consider the earnings in such an act as earnings of the company unless one year has lapsed since the realization of such earnings.
中文原文 公司法第54條
股東非經其他股東全體之同意,不得為他公司之無限責任股東,或合夥事業之合夥人。
執行業務之股東,不得為自己或他人為與公司同類營業之行為。
執行業務之股東違反前項規定時,其他股東得以過半數之決議,將其為自己或他人所為行為之所得,作為公司之所得。
但自所得產生後逾一年者,不在此限。

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