treatment. At one meal, he asked Chong'er how he intended to repay this debt. Chong'er replied that, should Jin and Chu meet on the battlefield in the future, he would order his own troops to retreat three she () or about . After Chong'er was restored to his throne by the duke of Qin, he did meet Chu in battle. Remembering his promise, he ordered his men to retreat three she. He used the occasion, however, to lure the Chu commander Ziyu into an ambush at Chengpu and won the battle there. Cold Food Festival Accounts of Chong'er and his retainer and musician Jie Zhitui or Zitui circulated by at least the 4th century BC. Sima Qian relates that Jie was among those who followed the prince through all his years of exile but, crediting Heaven with Qin's willingness to install Chong'er in place of Duke Yu, he declined to present himself at court for reward and insulted those who did so. He and his mother left to become hermits in the forests around MtMian and were never seen again. Chong'er was distracted during this time by the chaos of his installation, as Yu's partisans started riots and even burnt down the ducal palace. He was eventually reminded of Jie by a poem about a dragon and some snakes that was posted on his new palace's main gate; unable to find or reward him, he set aside the fields of Mianshang to endow sacrifices in his honor. This later developed into a temple, and Jie became regarded as a Taoist immortal with power over the weather by the early Han. Later legends embellished this story: after the retinue of exiles were robbed by bandits while traveling through the Chinese countryside, they ran so low on food that Chong'er was at risk of starvation. Jie prepared him a hearty soup of meat and wild herbs that revitalized him and, under questioning, revealed that he had used flesh from his own thigh to prepare it. Upon the prince's restoration in Jin, he proclaimed that "awards may be divided into three grades: the first-grade award goes to those [who] followed me into exile; the second-grade award goes to those who donated money; and the third grade goes to those who welcomed the return of my dukedom" and that even "those who have supported me in other ways but not yet been rewarded may