At the end of Qin Dynasty, Liu Bang finally defeated the overlord and won the world.

Liu bang returned to China dressed in gold and wanted to go to his parents' grave to worship, but because of years of war, the grave was covered with weeds and his parents' grave could not be found.

Liu bang is very sad. Although his subordinates also helped him search all the tombstones, he didn't find his parents' graves until dusk.

Finally, Liu Bang took the paper out of his sleeve, tore it into many small pieces, held it tightly in his hand, and prayed to God: "My parents are alive in the sky, so I will throw these papers into the air. If the paper falls in one place and the wind cannot move, it is my parents' grave. "

Say that finish, Liu Bang threw the paper into the air, and sure enough, a piece of paper landed on a grave that could not be blown no matter how the wind blew. Liu bang ran over and looked at the vague tombstone carefully, and sure enough he saw his parents' names engraved on it.

Later, folks like Liu Bang, Tomb-Sweeping Day went to the ancestral graves every year, and pressed a few pieces of paper on the graves with small clods to show his grave-sweeping.

Legend 2:

According to legend, during the Spring and Autumn Period and the Warring States Period, Zhong Er fled his hometown to escape the scourge. The courtiers who went out with him mostly parted ways at first. Only a few loyal people have been following him. One of them is called meson push. On one occasion, Zhong Er fainted from hunger. In order to save Zhong Er, Jiezitui cut a piece of meat from his leg, cooked it with fire and gave it to Zhong Er.

Nineteen years later, Zhong Er returned to China and became the monarch, that is, Jin Wengong, one of the famous five tyrants in the Spring and Autumn Period.

After Jin Wengong came to power, in addition to meson push, he offered many rewards to courtiers who shared his joys and sorrows. Someone defended meson in front of Jin Wengong. Jin Wengong suddenly remembered the past and felt guilty. He immediately sent someone to ask meson to take the imperial court to be rewarded as an official.

However, after several trips, the meson could not be pushed. Jin Wengong had to please. When Jin Wengong came to the meson pusher's house, he saw that the door was closed. Jiezitui didn't want to see him, and had already been hiding in Mianshan behind his mother's back.

Jin Wengong asked his body guard to search Mianshan, but he couldn't find it. So, someone had an idea, saying, it is better to let Yamakaji go, set fire on three sides, leave one side, burn it and the meson will come out.

Jin Wengong ordered the promotion of Yamakaji. Unexpectedly, the fire burned for three days and nights. After the fire was put out, the meson was not pushed out after all. Looking up the mountain, the mother and son were holding a charred willow tree and were dead. Jin Wengong looked at Jiexiu's body and cried, then buried Jiexiu and his mother under the charred willow tree.

To commemorate Jiexiu, Jin Wengong ordered Mianshan to be changed to Jiexiu Mountain, and an ancestral temple was built on the mountain, and the day when Yamakaji was released was designated as the Cold Food Festival, telling the whole country that it is forbidden to set off fireworks and firecrackers on this day every year and only eat cold food.