Chajang （dates unclear）. An early Silla monk who traveled to Tang China and studied in Zhongnan. He returned to Silla in 643， founding the Vinaya 戒律 school in Korea. He was a scholar of considerable merit in the areas of Kyeyul 戒律 and Wonyung 圆融， is credited for having been a major force in setting up the Korean sangha， and for helping to initiate the role of Buddhism as a national religion.