事理不二=Identity of Principle and Phenomena; 理事無礙=Unimpededness of Principle and Phenomena; 一多相即=Identity of One and Many; 本覺真心=True Mind of Original Enlightenment; 實際理地=the Sphere of Reality
The Weiyang school is a lineage of the Chinese Chan school,it is one of the "five houses" of Chan. Its founders are the Tang dynastymaster Lingyou (771-853) and his disciple Huiji (807-883). SinceLingyou used to live on Wei mountain in Hunan, and Huji lived on Yangmountain in Jiangxi, their lineage is called the Weiyang school. TheChan style of this school was strict and direct, aiming at insight into thesource of the mind, in order to accomplish the state of thusness thatmeans harmony of the absolute and phenomena. The Weiyang schoolwas the earliest of the five houses of Chan, and it was the first todisappear. After six generations historical records ended during the earlySong dynasty. Since the middle of the Tang dynasty, the Huayan schoolstill exerted its influence on Buddhist study and practice. On the onehand, there were erudite monks who specialized in the study ofHuayan’s thought. On the other hand, monks belonging to the Chanschool also emphasized the study of Huayan. Therefore, a number ofChan monks relied on the Huayan teachings when they expounded theirmethod of Chan practice. Several masters of the Weiyang school wereinfluenced by Huayan teachings to a considerable degree, and theyabsorbed numerous concepts from the Huayan school. Since not all ofthe masters of this school were influenced by Huayan thought andhistorical records are sparse, this study only discusses the combining andblending of Chan teachings and Huayan thought as manifest in therecords of the teachings of Weishan Lingyou and Yangshan Huiji, inorder to explain the Huayan characteristics of their Chan teachings.