Since the Indian Buddhist culture was introduced to the Chinese culture by Geyi Buddhism in Eastern Han Dynasty, it has evidently experienced a series of exchanges, conversations, interrogations, and examinations. The advantages were borrowed as examples and fused to develop the new thought. Finally, the union or integration of the three religions became the tradition after Ming and Qing Dynasty. If the transitional process is observed in terms of Buddhism itself, Song Dynasty is a key period. Buddhism inherited from the interpretations of the former three religions and faced the political changes and the challenges of New Confucianism. The responsive process led to more inclination of Buddhism for Confucianism, and this paper aims to discuss its obvious exhibition in Zen Buddhism. The book of Chan Lin Bao Xun is the records of the senior monks' good words and acts during the two Song Dynasties edited by Masters Dahui Zonggao and Zhuan Shigui. It was reedited by Master Jing Shan and has been handed down ever since. From this book, we can see the reflective words on the contemporary phenomenon of Zen Buddhism from the important Zen masters in the two Song Dynasties. Based on the book, this paper briefly introduces the interactive words between the three Buddhist religions in history and then has a major discourse on the phenomenon of Confucian Chan formed by the Zen masters in Song Dynasty. The major discussion will focus on the examples of formation and application of the internal and external causes, and the definition on Confucian Chan will serve as a manifestation and Buddhist turning point in the exchange history of the three religions.
