The Chinese obsession with jade runs deep. From the Neolithic Hongshan and Liangzhu cultures, through the Shang, Zhou, and Han dynasties, right to the present — five thousand years unbroken.

But here is something you may not know: China's finest jade does not come from the Central Plains.

It comes from Hetian in Xinjiang — three to four thousand kilometres away.

So here is the question: three thousand years ago, with no railways and no highways, how did this stone travel from Central Asia to the Central Plains?

Hetian jade comes from the Yurungkash River and Karakash River in today's Hetian region of Xinjiang. Both flow down from the Kunlun Mountains — the rivers yield seed jade, the mountains yield mountain jade.

From Hetian to the Central Plains, the route must cross the Taklamakan Desert, the Hexi Corridor, and the Loess Plateau. It is one of the hardest journeys on earth.

This route predates Zhang Qian's opening of the Western Regions by at least two thousand years.

In 138 BC, Zhang Qian was sent west, opening what we now call the Silk Road. It is the earliest officially documented formal trade route.

But archaeology tells us something else: long before Zhang Qian, jade was already flowing from Central Asia into the Central Plains along a similar route.

Jade objects excavated from the tomb of Fu Hao at Yinxu — a Shang-dynasty noblewoman who lived in the thirteenth century BC — have been identified as mostly Hetian jade. That is 1,200 years before Zhang Qian.

In other words: the jade road is at least a thousand years older than the Silk Road.

Scholars call this route the "Jade Road" or "Kunlun Jade Route", and consider it the earliest and most continuous link between the Central Plains and the Western Regions.

Why was the Jade Road so difficult?

Because jade is heavy.

A single block of Hetian jade weighing dozens of kilograms might require dozens of camels or horses. The route crossed deserts, snow mountains, and rivers. A single trip could take months, sometimes a year.

Silk is light — a bolt weighs next to nothing, one camel can carry many bolts, and the margins are good. Moving jade, by contrast, is a heavy-asset, high-risk, long-cycle business.

But the Chinese were willing. From the Shang dynasty on, jade was considered a medium for communicating with the divine — a symbol of status, power, and virtue. Emperors used it in sacrifices, feudal lords used it in diplomacy, nobles used it in burials. That demand sustained the Jade Road for three thousand years.

Hetian jade reaching the Central Plains came in three main forms:

Seed jade — pebbles polished by millions of years in riverbeds. Rounded, with good skin and rich oiliness. The most prized.

Mountain jade — ore mined directly from the mountains. Large blocks, sharp edges, slightly less oiliness.

River-slope jade — in between: fallen from the mountains into upper riverbeds, not yet fully rounded.

The three forms are found in different positions along the river, and traded differently. Seed jade is the most expensive — scarcest and most beautiful. Mountain jade is cheaper because it can be mined at scale.

Today, when we judge Hetian jade, the first question is: seed or mountain? That standard began forming as early as the Tang dynasty.