Code of Civil Procedure Article 124

Service of process shall be effectuated by an execution officer or post office delegated by the court clerk.In cases of service effectuated by a post office, the relevant postman shall be deemed the person who effects service.
中文原文 民事訴訟法第124條
送達,由法院書記官交執達員或郵務機構行之。
由郵務機構行送達者,以郵務人員為送達人。

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