The Banking Act of The Republic of China Article 35-1

The responsible persons and staff of a bank shall not hold concurrent positions in other banks, except where they may concurrently serve as the director or supervisor of an invested bank arising from an investment relationship and approved by the central competent authority.
中文原文 銀行法第35-1條
銀行負責人及職員不得兼任其他銀行任何職務。
但因投資關係,並經中央主管機關核准者,得兼任被投資銀行之董事或監察人。

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