Abstract This study employs I Ching (Classic of Change) to investigate the change of Chinese foreign policy, aiming to explain whether China's foreign policy from 2013 to 2018 has fundamentally changed from lying low to a new pattern. I Ching presents that things in the world are always changing; the creating and cultivating principles in five agents are the fundamental rules of change; all things undergo six stages of changes from beginning to end. Accordingly, the author established a new theoretical model Classic Change theory, proposing that the change of state behavior is based on creating and cultivating principles of five forces: ideology, power, wealth, reform, and state; state behavior is directly created from ideology and cultivated by power; and state experiences six distinctive changes from establishment to extinction. The thesis argues that China's foreign policy is created by ideology and cultivated by power; specifically, with the inborn credentials, acquired capacity and inherited power, Xi Jinping's power is created from rapid economic growth and military buildup and intensified by anti-graft campaigns and political reforms; renewed communist ideology, restoring traditional thought and state capitalism together influenced and altered state's ideology, resulting in China advancing into a new phase and emergence of new foreign policy. The Ideology phase China, remains in inner stage, confronts with a dangerous situation in high vigilance, and adopts defensively proactive foreign policy. Classic Change theoretical model is developed to explain the myth of state behavior by exemplifying the case of China's foreign policy. This thesis emphasizes the value of foreign policy theory linking influences in correlative mode and yet attempts to be parsimonious and generalizable. The study may be conducive to enrich the scholarship of CFP as well as IR theory, providing a new research perspective to understand China and its foreign policy.