一行
According to Robert Sharf, Chán Master Yi Xing (Ch. 一行禅師) was the most eminent of his students. Yixing belonged to the northern school of Chán Buddhism, but this was not seen by Chinese Buddhist culture as being fundamentally different from the esoteric teachings of Śubhakarasiṃha. Around the turn of the eighth century, the northern school was known for its esoteric practices of dhāraṇīs and mantras.