The simmering of loquat paste includes four steps, including washing loquat, crushing loquat, adding rock sugar to boil, adding Sichuan shellfish powder to simmer, etc. The details are as follows: 1. Cleaning loquat: clean the loquat, remove the seeds and skin, put it into a cold water casserole and boil it, after boiling, fish out the loquat. 2. Mash the loquat: the loquat meat crushed into puree, the puree and loquat water mix, into the casserole, reduce to medium heat and simmer. 3. Add rock sugar and boil: add rock sugar and boil until dissolved. 4. Add Sichuan shellfish powder and simmer: Reduce the heat to low, add Sichuan shellfish powder and stir evenly, simmer until thickened. Lastly, the last in an open container, cooled to a sealed container, refrigerated storage. Note that you should not use an iron skillet to boil the Pei Pa Koa Ointment. Patients with cold and flu, pregnant women, and children should consume it under the guidance of a doctor. It is also not advisable to take Chinese medicines such as Chuanwu, Prepared Chuanwu, Caowu, Prepared Caowu, and Psoralea when taking Chuanbei Pei Pa Koa Ointment.