Bittersweet tea is divided into large-leaf bittersweet and small-leaf bittersweet, as you said the big one is very bitter, the small one is not as bitter as the big one, but their effects are the same. The large-leaf bittersweet is made from old leaves, while the small-leaf bittersweet is made from young leaves.

The leaves of Bittering Tea are 1.5-2 times larger than ordinary tea leaves, oval-shaped, thick, leathery, and without hair. The fresh leaves are glossy and dark green. Tea made from young buds and leaves is stout, curly and hairless. Brewing can determine the authenticity: Bittering tea taste is first bitter (this bitter taste is the taste acceptable bitter) and then have a slightly sweet taste, no astringent, spicy, smelly, sour and other odors, resistant to brewing. Bittering tea made of young leaves 1 gram can be brewed 150ml of water, its tea flavor is strong, brewing 8 times -10 times the taste is still strong, is difficult to compare with ordinary tea. Tea made from old mature leaves, its taste is also first bitter and then sweet, no greenish flavor, the taste is significantly thick and slow release, resistance to brewing is the main feature. Add 2-4 times the amount of tea flavor just feel slightly thick, its bitter taste is still refreshing, mellow and sweet, and will not become strange bitter intolerable. It is difficult to be made by other leaves or even adding some substances. Sweet taste is too strong, with a sweet taste, may be added licorice or sugar. If there is a ginseng flavor, it may be gibberellic acid or other ginseng. Check the bottom of the leaf: the bottom of the bitter tea leaf is purple-brown, without velvet hair, the leaf is big and thick, and the tea stalk is thick and sturdy. The old leaf area of the whole piece is large, and the leaf edge teeth are more pure.