My LiuAn comes in 500g baskets wrapped by bamboo leaf. One basket is
loose leaf. The other slightly compressed but flakes easily. The
loose basket is expensive $25 the compressed cheap $6. The taste I
describe as mild shu with strong notes of sheng. My notes say LiuAn is
a single fermentation and puerh a double. Fermentation will produce
gas as a byproduct and oxidation can't.

Jim