汝瓷 (Rǔ Cí)
Ru ware (汝瓷) is considered the supreme achievement of Song Dynasty ceramics — and one of the rarest in the world: only 67 authenticated Song Ru pieces survive globally. The kiln was active for only approximately 20 years (c.1086–1106 CE) before being abandoned when the Northern Song court fell to Jin Dynasty invasion. The glaze color — described as 'the blue of the sky after rain' (雨过天晴云破处) — is produced by a unique combination of local Ruzhou agate-bearing clay in the glaze, a specific firing temperature window of only 20°C, and reduction atmosphere timing. The revival tradition (active since the 1980s) represents one of the most ambitious craft reconstruction projects in China: reverse-engineering a lost technique from scientific analysis of surviving Song pieces. The current revival glaze approximates but does not replicate the Song original — the specific agate source and firing protocol remain incompletely reconstructed.
Risk level: Endangered · China National ICH List (2008)
The manual processing of tea leaves into China's six great tea categories — green, yellow, dark, white, oolong, and black — through a shared vocabulary of core techniques including shaqing (enzyme inactivation), weidiao (withering),…
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Wheel-thrown and hand-modeled earthenware from Barcelos (Minho) — the tradition that produced the Galo de Barcelos (Rooster of Barcelos), the most universally recognized symbol of Portugal internationally.
The hand-building of unglazed pottery without a wheel in the Canary Islands — a living tradition descended directly from the Guanche indigenous potters who settled the archipelago from North Africa around 1000 BC.