The so-called "rouge" is actually a kind of flower called "red and blue". Its petals contain red and yellow pigments. When flowering, the whole flower is picked, and then repeatedly mashed in a stone bowl to remove the yellow juice, which becomes a bright red dye. There are two kinds of rouge for women's makeup: one is made of silk floss dipped in red and blue flower juice, which is called "Mian Yan Zhi"; The other is processed into small and thin flower pieces, which are called "golden flowers and swallows". After drying in the shade, these two kinds of phoenix tree branches can become a dense and lubricating oil. As a result, Yan Zhi was written as "Marriage Fat Man" and "Moon Swallow Fat Man". The word "fat" has real meaning. Besides red and blue, the raw materials for making rouge are crimson, pomegranate, mountain flower and sappan.