The Legend & Merits of Ru Ware from Pingdingshan, China
（中国平顶山汝窑的故事与优点 · 英文版）
（中国平顶山汝窑的故事与优点 · 英文版）
THE STORY – A 900-year-old sky-blue legend
In the late Northern-Song dynasty a small kiln lit up at Qingliangsi village, today’s Baofeng County, Pingdingshan.
Emperor Huizong, so the tale goes, dreamt of a shower clearing and woke obsessed with “the exact tint where sky breaks through after rain.” He ordered potters to reproduce that single colour. Local craftsmen ground agate into the glaze, supported the wares with tiny “sesame-shaped” spurs so they could be fired upside-down, and finally obtained a jade-like sky-blue finish. Yet Ru kilns served the court for barely twenty years; when the Jurchen armies swept south the fires were snuffed out and the recipe vanished. By Yuan times fewer than a hundred intact pieces survived; Ming and Qing imperial kilns tried for centuries to copy them, sighing that “Ru is the hardest of all to match.”
Emperor Huizong, so the tale goes, dreamt of a shower clearing and woke obsessed with “the exact tint where sky breaks through after rain.” He ordered potters to reproduce that single colour. Local craftsmen ground agate into the glaze, supported the wares with tiny “sesame-shaped” spurs so they could be fired upside-down, and finally obtained a jade-like sky-blue finish. Yet Ru kilns served the court for barely twenty years; when the Jurchen armies swept south the fires were snuffed out and the recipe vanished. By Yuan times fewer than a hundred intact pieces survived; Ming and Qing imperial kilns tried for centuries to copy them, sighing that “Ru is the hardest of all to match.”
The 20th-century hunt began in the 1950s. In 1986 a Baofeng factory worker bought a small sky-blue washer for 600 yuan from a farmer; Shanghai Museum identified it as Northern-Song Ru, locking the location to Qingliangsi. Fourteen seasons of excavation followed, uncovering twenty kilns, three workshops, thousands of glaze-sherds and a “Zheng-he tong-bao” coin that pins the closure to 1111-1118 AD.
Today the site is a national-grade museum; the firing craft is on China’s Intangible Cultural Heritage list. Inside Pingdingshan more than 60 ancient kiln sites have been mapped, and nearly a thousand studios and companies in Ruzhou, Baofeng and Shilong District turn out modern Ru ware with an annual output exceeding 3 billion RMB, exported to thirty countries. Master craftsmen such as Meng Yusong have re-created the agate glaze and spur-fired满釉 (full-glaze) technique, letting the colour of “rain-washed sky” shine again.
From a single emperor’s dream to kilns re-lit after a millennium, the Ru story is China’s most dramatic saga of lost-and-found ceramic genius.
THE MERITS – Why Ru still sits atop world ceramics
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Glaze Colour – the final word in celadon
Agate-melted glaze crystallises into a soft, layered sky-blue that shifts with light: bluish-green in sunshine, lavender-grey in shadow. Micro-bubbles (“morning stars”) and occasional crab-claw veining give depth even though the glass layer is only 0.3 mm thick. -
Body – “incense-ash” porcelain
Low-iron local clay fires to a pale, porous grey. Its thermal expansion perfectly matches the glaze, eliminating the large crackle seen in Guan or Ge wares; when tapped it gives a muted, wood-like note prized by Song connoisseurs. -
Form – minimalist court elegance
Every curve is calculated to catch the glaze’s best angle: a 3–5° flared rim, a 45° beveled foot, five sub-3 mm spur scars—no handles, no carved flowers, nothing to distract from the colour itself. -
Technology – agate in, flaws out
Ground agate supplies extra silica for glassy brilliance and micro-iron for the bluish tint, while its low alumina keeps melt-viscosity down, allowing the thin glaze to fuse at 1220 °C without running onto the kiln floor. -
Rarity & resonance – 100 pieces, 1000 years
With the original workshop buried and a modern replica success-rate still below 15 %, every Ru bowl—ancient or new—carries the aura of a relic. It is the benchmark against which all later celadons are measured.
In short, Ru ware freezes a moment of Chinese aesthetics: the colour of the sky, the feel of jade, the discipline of imperial taste, and the patience of a thousand years— all in a teacup.
