The edict
Specialists disagree. TeaHQ does not pick a winner.
The Hongwu emperor, founder of the Ming, is recorded as having ordered in 1391 that tribute tea be submitted as loose leaf rather than as the elaborate compressed cakes the Song and Yuan courts had required. The reason conventionally given is the labour and expense of producing the cakes. Whether an imperial instruction about tribute could by itself redirect a national drinking habit is a fair question, and the more careful accounts read the edict as the decisive push to a shift already under way rather than as its sole cause. There is a plausible economic reading of the decision that is worth putting alongside the stated one. Compressed tribute cake production consumed enormous labour for a small quantity of tea, and a new dynasty consolidating its finances after a long period of war had obvious reasons to stop paying for it. Whether the emperor’s motive was frugality, a distaste for Yuan court practice, or the reasons given in the record is not something TeaHQ can settle, and different accounts weight them differently.
What changed in the cup
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Steeping whole leaf in water and drinking the liquor — the method almost everyone now means by making tea — became the dominant Chinese practice from this period. The bowl for whisking gave way to vessels for steeping and decanting. Pale porcelain returned to favour, since a clear amber liquor shows better against white than against black. Whisks and grinding mills fell out of ordinary use. Reading a Song text and a late Ming text on tea, the equipment lists barely overlap. The vocabulary changed with the equipment. Terms for grinding, sieving, whisking and judging foam fall out of use; terms for leaf appearance, liquor colour, aroma and the behaviour of the leaf in water come in. Tea writing after this point is recognisably about the same questions a modern taster asks, which is a large part of why late Ming and Qing tea literature reads as accessible while Song tea literature reads as a description of something else entirely.
The categories follow
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Loose-leaf manufacture opened the space in which most of the tea types now recognised were developed or refined: pan-fired greens shaped by hand, the partially oxidised teas that became oolong, scenting with flowers, and eventually fully oxidised black tea made for export. The Yixing stoneware teapot emerges as a form in this period and becomes the characteristic vessel. It is not an exaggeration to say that the modern Chinese tea catalogue is a Ming and Qing construction resting on a fourteenth-century administrative decision. The timing also explains why Europe met the tea it did. European buyers arrived at Chinese ports from the seventeenth century, after the loose-leaf shift and during the period when oxidised teas made for keeping and travelling were being developed, and what they bought and carried home shaped what the entire Western world thinks tea is. Had the trade opened three hundred years earlier, Europe would have received compressed tea to be ground and whisked, and every subsequent Western tea habit would be different.
What survived the reform
TeaHQ's own reading of well-attested general knowledge, with no single source behind it.
Compression did not disappear. It persisted where transport demanded it — the border trade in coarse pressed tea to Tibet, Mongolia and Central Asia continued, and that lineage is the ancestor of today’s pu-erh, fu zhuan and other dark teas. So the two halves of the Chinese tea catalogue are a direct inheritance of this split: loose leaf for the internal market, compressed brick for the frontier, made from different material for different reasons. Anyone who wonders why pu-erh looks nothing like the rest of Chinese tea is looking at the branch the reform did not touch. Two smaller survivals are worth noting as well. Powdered tea did not vanish entirely from Chinese practice and appears in some regional and medicinal uses. And the grandpa style of drinking — leaf loose in a tall glass or jar, topped up with water through the day — is the simplest possible expression of the loose-leaf method and remains the most widespread way tea is actually consumed in China, which is worth remembering when reading about gaiwans.