1   Domestic applicants must have obtained a bachelor’s degree from a domestic university or independent college accredited by the Ministry of Education of Taiwan, from a foreign (international) university or college recognized by the Ministry of Education of Taiwan, or have obtained an education level equivalent to Master degree.
http://exams.ccu.edu.tw/index.php

2   Foreign (and international) applicants must currently hold nationality of a foreign country other than Taiwan, Mainland China, Hong Kong and Macau, and have never held Overseas Chinese Student Status.
https://oia.ccu.edu.tw/p/412-1008-1430.php?Lang=en
    ★ Before you fill in the on-line system, you may need an e-copy of following
        documents：
      A. Diploma with verification by Taiwan Official Representative Office
      B. Transcript
      C. Two Recommendation Letters
      D. Declaration of Nationality
      F. Study Plan
      G. Language Proficiency
      All applicants must provide evidence of English proficiency (such as TOEFLPBT, TOEFL CBT,
     TOEFL IBT, IELTS, TOEIC, or GEPT).