張保皐
By the ninth century thousands of Silla subjects were living in Tang, centered mostly around merchant activities in coastal Shandong and Jiangsu provinces, where they established their own Silla communities often led by Silla officials. Wealthy benefactors (including at one point Jang Bogo himself) even established Silla Buddhist temples in the region, as related by the 9th-century Japanese monk Ennin, whose journal constitutes one of the other rare sources on Jang Bogo.