The method for making the immortal hairpin is simple and convenient. First, dry immortal grass is put into a pot and decocted. When the heat reaches a certain level, the grass stains are picked up, then the immortal grass soup is filtered, and then a proper amount of starch or rice flour and sweet potato flour are poured in, and the mixture is heated and stirred continuously. When the soup becomes paste, it is poured into a porcelain bowl and cooled, and the immortal board is formed.

After cooling, the Xianren hairpin is black gel-like. When eating, it can be put in a bowl, crushed with a knife, and mixed with honey (or sugar) and perfume. It is sweet, fragrant, tough and smooth with the unique fragrance of "Xianren Grass". It can not only relieve hunger and thirst, but also has many functions such as clearing away heat and expelling summer heat, helping digestion, reducing blood fat and treating diabetes.

XianrenZan, also known as CaoZan, is a famous Han snack in Guangdong and Fujian. It is a refreshing drink and can also temporarily satisfy hunger. It is made of fairy grass. It is the custom of Hakkas to eat XianrenZan in the lunar calendar. It is said that eating XianrenZan on this day will not lead to prickly heat throughout the summer. Immortal hairpin has the function of cooling and relieving summer heat, and there is no disadvantage of being cold and suffering from cold. Add honey to "Immortal Hairpin" and sprinkle some banana dew to make it sweet and refreshing.