The two are fundamentally different, tangerine red and orange red is not the same thing, can be so understood, these two are "cousins" relationship, orange red recorded in the "Compendium of Materia Medica", is the orange peel; tangerine red is a special product of Huazhou, is the peel of Huazhou pomelo, the two can not be confused and misuse, but also can not be replaced by each other.