While earlier criticisms of O’Neill’s dialogue with the East tend to focus on his use of Buddhism and Hinduism in his writings,more recent criticisms have started to pay attention to his use of Chinese Taoism. The common inadequacy of the latter is that they offer little historical information about how O’Neill came to know China. Additionally,they tend to focus on O’Neill’s use of Taoism while neglecting his use of Confucianism.This essay seeks to supplement existing criticism by first delineating the historical background of O’Neill’s contact with China,and then discussing Tao House( 1936) and his play Marco Millions( 1927) as fruits of his dialogue with China. This essay will show that in Marco Millions,O’Neill made use of both Taoism and Confucianism.