In the northeastern corner of Jiangxi province, tucked among mountains, sits a small and unassuming city called Jingdezhen.

It is not coastal. It does not sit on a border. It is not on any major trade route. On a map, it looks almost peripheral.

And yet this mountain town has been making porcelain since the Song dynasty, through the Ming and Qing, and right up to today — a thousand years without stopping.

Why Jingdezhen?

The answer is not people, and not emperors. It is geography.

What does it take to make porcelain? Simply put, three things: clay, water, and fire.

Jingdezhen had all three.

Clay determines the body, water determines the route, fire determines the firing. All three happened to be in Jingdezhen — and close together.

This was not coincidence. It was a gift of geography.

Today the word used across the global ceramics industry — kaolin — comes from a single mountain near Jingdezhen.

In the early eighteenth century, a French missionary named Père d'Entrecolles arrived in Jingdezhen. He wrote two long letters back to Europe describing how porcelain was made. In them, he mentioned a place called "Gaoling" that produced a white clay essential to the craft.

Europeans later called this clay kaolin. To this day, kaolin the world over is named after that small hill in Jiangxi.

The key property of kaolin is its heat resistance.

Ordinary clay begins to soften and deform at around 1000°C. Jingdezhen kaolin withstands above 1300°C. This meant Jingdezhen kilns could fire hotter than anywhere else — and the hotter the firing, the denser the body and the more translucent the glaze.

This is the material foundation of Jingdezhen porcelain: "thin as paper, white as jade, ringing like a chime".

Raw material was not enough. Porcelain is fragile — how to move it was a serious problem.

Jingdezhen was lucky. It had the Chang River.

The Chang originates in Anhui to the north, cuts through Jingdezhen, and flows south into Poyang Lake. Poyang connects to the Yangtze, and the Yangtze reaches the sea. One waterway linked Jingdezhen to China — and the world.

Porcelain left Jingdezhen by boat, downstream to Poyang, transferred to larger vessels, then north along the Grand Canal to the capital, or south through Guangzhou and Quanzhou to Southeast Asia, the Middle East, and Europe.

During the Ming and Qing, Jingdezhen produced millions of pieces a year. Almost all of them left along this river.

Without the Chang River, Jingdezhen might have remained a mountain town with good clay. The river is what pushed it onto the world stage.

The colour of porcelain depends heavily on the kiln.

In wood-fired kilns, the choice of fuel matters enormously. Pine has long flames, high heat, and low ash — producing clean glaze and high whiteness. This is another secret behind Jingdezhen porcelain's "white".

Other places also burned wood, but used mixed timber or coal. Shorter flames and more ash produced porcelain that often looked yellow or grey. Not because the craftsmen were less skilled — because the fuel was different.

The hills around Jingdezhen were covered in pine. Over centuries, entire forests were consumed by kiln fires. Even today, the finest Jingdezhen porcelain is still fired in wood kilns — a single firing takes dozens of hours and burns several tonnes of pine.