This paper attempts to offer a critique of Mou Tsung san's judgement of Christianity as a "li-jiao" [separate religion (teaching)], which is inferior to "yuan-jiao" [perfect (round) religion (teaching)], as exemplified by Confucianism. The paper consists of two main parts. Based upon an analysis of Mou's understanding of the Christian doctrine of God, which forms the basis of Mou's judgement, the first part argues two points. Firstly, Mou employs a Hegelian dialectical framework to understand the life-process of God, and secondly, Mou's taking Christianity as a "separate religion" is based upon the idea that the Incarnation is the manifestation of God's objectivity rather than Jesus' subjectivity. The second part presents Tillich's idea of the triune God as an alternative to illustrate that the use of Mou's dialectical frame- work does necessarily have the corollary that Christianity is a "separate religion". In Tillich's Trinitarian under- standing of God, divine transcendence and immanence, the finite and the infinite, being and personal, God and the world are all included in the symbol, "living God". According to this understanding, the Christian doctrine of God is "perfect" rather than "separate".