1. Soak the hair first and then stew it. Generally speaking, eight hours is enough for soaking and stewing, but if there is old gum that has been stored for a long time, such as two or three years, the gum will be thicker and the soaking time will be extended by two or three hours.

2. Use cold boiled water or warm water for soaking hair. Don't use boiled water or put seasoning or acid and alkali. Wash it before soaking hair. After the hair is soaked, if it is small fish glue, it can be stewed directly. If the fish glue is too big, it should be cut into pieces. Of course, it can also be cut first and then soaked, but it needs a special hay cutter.

3. When stewing, you can put medlar and jujube together to make it sweet, or stew it with chicken bones or pig bones to make it salty. You can also mix it with tremella and jujube, lily and lotus seeds, jujube and yellow wine, notoginseng and medlar, ginseng and chicken, cordyceps and medlar.