This essay is potentially a response to a previous essay of Professor Bau-Ruei Duh, who considers Junyi Tang's 'absorbing Christianity and Buddhism with Confucianism' a confusion of ideas. This essay argues that the aim of Tang's philosophy is not to discuss the thought of Christianity and Buddhism in a so-called 'objective' way, but to put these two intellectual and religious traditions, together with Confucianism, within his own philosophical system, concluding that these traditions could co-exist harmoniously without obstruction. In this sense, arguing that Tang was to 'absorb Christianity and Buddhism with Confucianism' is inappropriate. In Tang's view, what makes Confucianism superior in comparison with its counterparts is the function that Confucianism plays, that is to help make various traditions co-existing. Unlike most studies about Tang that focus on Tang's emphasis on the dominant role of Confucianism, this essay argues that Tang was to re-define the limitations of Confucianism.