What is "hyecho"

Hyecho (; 704–787), Sanskrit: Prajñāvikram; pinyin: Hui Chao, was a Buddhist monk from Silla, one of the Three Kingdoms of Korea.

Hyecho studied esoteric Buddhism in Tang China, initially under Śubhakarasiṃha and then under the famous Indian monk Vajrabodhi who praised Hyecho as "one of six living persons who were well-trained in the five sections of the Buddhist canon."

On the advice of his Indian teachers in China, he set out for India in 723 to acquaint himself with the language and culture of the land of the Buddha.