The Cold Food Festival or Hanshi Festival is a traditional Chinese holiday celebrated for three consecutive days starting the day before the Qingming Festival in the Chinese Calendar, which falls on the 105th day after dongzhi (April 5 by the Gregorian calendar, except in leap years). It is celebrated in China as well as the nearby nations of Korea and Vietnam. At this time of year, the sky becomes clearer and buds sprout in the field. Farmers sow various seeds and supply water to their rice paddies.

Legend has it that Chong'er (重耳), a prince of Jin, endured many hardships while he fled around the warring states. Once, in order to help the prince who was tormented by hunger, Jiè Zhītuī (介之推 or Jiè Zǐtuī, 介子推) cut off the flesh from his thigh and offered it to the prince for sustenance.