Uisang (625–702) was one of the most eminent early Silla Korean scholar-monks, a close friend of Wonhyo. He traveled to China, studying at Mount Zhongnan as a student of the influential Huayan master Zhiyan and as a senior colleague of Fazang, with whom he established a lifelong correspondence. He became an expert in Huayan doctrine and was the founder of the Korean Hwaeom school. Most well-known among his writings is the Beopseongge or Hwaeom ilseung beopgye do (Diagram of the Avataṃsaka Single Vehicle Dharmadhātu). This is a commentary on his mandala-like diagram haein do ('Ocean Seal'), which consists of 210 Chinese characters that express the essence of the Huayan doctrine. A full translation can be found in the appendix to Odin, 1982. Little is known of his early life other than his father was named Hin-sin and his family name was Kim. He is famous for his travel to Táng China with his friend, Wonhyo.

Uisang - Wikipedia