PU'ER tea is post-fermented tea with ages to get its flavour. Its woodiness, earthy, and roasted aroma is popular after heavy dinner. The contained enzyme grows in time while it is aged, this assists with digestion, lowering blood cholesterol and weight control. The tea is frequently pressed into a cake and aged into two sub-class-shu and raw. The tea colour of shu Pu'er is black, and raw is often greenish gold. Its medical value and aroma are often related to the duration it is aged.