Ennin survives the Huichang persecution
Ennin reached Chang'an hoping to study, and between 842 and 845 he watched Emperor Wuzong's Huichang persecution close some 4,600 monasteries, laicize over 260,000 monks and nuns, and melt bronze images for coin. As a foreign monk he was forcibly returned to lay status, but he kept his scriptures and ritual implements hidden and made his way to the coast. Korean merchants helped him sail home in 847, and he carried Tendai esoteric teachings to Japan, where he later became head of the Tendai school on Mount Hiei.