"Immortal Board" is made of immortal grass. It is the custom of Hakkas to eat "Immortal Board" (Immortal Frozen) in the lunar calendar. It is said that eating "Immortal Board" on this day will not cause prickly heat all summer. "Immortal board" has the function of cooling and relieving summer heat, and there is no disadvantage of suffering from cold. Adding honey into "Immortal board" makes the food sweet and refreshing. Now, there is still a big market for bean jelly products.
legend: in ancient times, ten suns were blazing in the sky, which dried up the river and cracked the earth, and the crops and vegetation were scorching day by day. Houyi's arrow, which was brave and good at shooting, did not fail, and shot out nine suns at once. The Queen Mother of the Western Heaven gave her immortal medicine in recognition of her hero. Unfortunately, her wife Chang 'e stole the fairy medicine and ran into the moon. Hou Yi, who stayed in the world, sighed. After suffering, Hou Yi ordered his soldiers to collect 1 boys and girls to go to Xianren Island to pick Xianren grass, so that all the people were frightened, and the soldiers left Germany, and Hou Yi was exhausted and depressed.
Soon, a kind of grass sprouted on Houyi's grave, and it soon spread all over the country. This kind of grass can cool down the summer heat, clear the heart and remove fire, and the people call it immortal grass. It turned out that Hou Yi suffered from the burning of heart fire before his death, and his soul suddenly realized after leaving his shape that life must rely on a kind of cool maintenance that ignores the cruel environment. Therefore, his desire to find immortal grass in his heart turned from illusion to reality, calming the resentment of the world against him with his own dedication, and crossing the world in the fire of life with his own spiritual enlightenment.