Li Ao developed an ideological system called Xin Xing (Mind and Nature) by combining ideas from Confucianism, Buddhism, and Taoism. His system focuses on honesty (Cheng) in ontology and human nature, aiming for self-improvement and an ideal state of Supreme Honestness. Li Ao's ideas paved the way for the Study of Confucian Ideology in later dynasties, bridging the gap between different philosophical traditions in ancient China.