Cold food festival, also known as smoke-free festival, cold food festival. The date of the Cold Food Festival is just one or two days before Tomb-Sweeping Day. At first, the custom of the Cold Food Festival was not to cook with a fire, but to eat cold food and cooked food prepared in advance, hence the name "Cold Food Festival", which means cold food. However, in the following thousands of years of historical development, customs such as climbing, sweeping, swinging and cuju gradually increased.

After the fire was banned, it was changed to the Cold Food Festival to commemorate the famous minister of Jin in the Spring and Autumn Period. Legend has it that during Jin Wengong's exile, Jiezitui cut down his shares to satisfy his hunger. When Jin Wengong returned to China as a monarch, he forgot to recommend him when he was enfeoffed. Jiezitui didn't want to boast about his achievements and compete for favor, so he took his mother to live in seclusion in Mianshan.

Later, Jin Wengong personally went to Mianshan to find Jiezitui, who didn't want to be an official and hid in the mountains. Jin Wengong's men released Yamakaji, which was intended to force meson to expose him. As a result, meson pushed his mother and was burned to death under a big tree. In order to commemorate this loyal minister and righteous man, people don't make a fire to cook and eat cold food on the day of Jiexiu's death, which is called Cold Food Festival.