in 636, the duke of qin finally invaded jin on chong'er's behalf and installed him as its duke. (posthumously, he became known as the "wen" or "civilized duke" of jin.) in 635, the new duke was generous to those who had helped him in adversity but overlooked jie, who sadly withdrew into poor obscurity in the forests near . the duke sent repeated envoys to lure jie back to court, but he felt no ambition for political power. too loyal to directly criticize his master but too principled to accept a place in a corrupt administration, he opted to simply remain in seclusion. annoyed, the duke ordered a forest fire to be started around three sides of the mountain to smoke jie and his mother out of hiding. instead of coming out, they were burnt alive. jie's charred corpse was found still standing, embracing or tightly bound to a tree. in his remorse, the duke renamed the mountain mt.jie, established the town still known as jiexiu ("jie's rest"), and inaugurated the cold food festival as a memorial period for jie.