Huineng, also known as the Sixth Patriarch of Chan (Zen) Buddhism, was a pivotal figure in the development of Chan Buddhism in China. His teachings differed significantly from those of his predecessors, mainly in the emphasis he placed on the concept of "sudden enlightenment" and the rejection of traditional Buddhist practices.

One of the main differences between Huineng's teachings and those of his predecessors was his emphasis on the concept of "sudden enlightenment." This concept, also known as "instant awakening," suggests that enlightenment can be achieved in a single moment, rather than through a gradual process of meditation and practice. This idea challenged the traditional Buddhist belief in the gradual path to enlightenment, which involved strict adherence to moral and ethical codes, as well as years of meditation and study.

Huineng also rejected the traditional Buddhist practices of ritualistic chanting and the study of Buddhist scriptures. Instead, he emphasized the importance of direct experience and personal understanding. He believed that enlightenment could not be attained through the study of texts or the recitation of prayers, but only through the direct realization of one's true nature.

Furthermore, Huineng's teachings also differed from his predecessors in his rejection of the notion of a separate self or ego. He taught that the true nature of reality is non-dualistic, and that the concept of a separate self is an illusion. This idea challenged the traditional Buddhist belief in the existence of an enduring self or soul that continues after death.

Another significant difference in Huineng's teachings was his emphasis on the practice of "silent illumination" or "non-dualistic meditation." This form of meditation involves simply sitting in a state of awareness, without any specific focus or object of meditation. This practice is in contrast to the traditional Buddhist methods of meditation, which involved focusing on a specific object or mantra.

In summary, Huineng's teachings differed from those of his predecessors in their emphasis on sudden enlightenment, rejection of traditional practices and rituals, and the concept of non-dualism. His teachings had a profound impact on the development of Chan Buddhism, and his influence can still be seen in the teachings and practices of Zen Buddhism today.