Fragments of ancient pottery found in southern China turn out to date back 20,000 years, making them the world’s oldest known pottery — 2,000 to 3,000 years older than examples found in East Asia and elsewhere.

The ceramics probably consisted of simple concave vessels that were likely used for cooking food, said Ofer Bar-Yosef, an archaeologist at Harvard and an author of the study, which appears in the journal Science.

“What it seems is that in China, the making of pottery started 20,000 years ago and never stopped,” he said. “The Chinese kitchen was always based on cooking and steaming; they never made, as in other parts of Asia, breads.”

The crockery, found in Xianrendong Cave in Jiangxi Province, belonged to a group of mobile foragers, Dr. Bar-Yosef said. They were a hunting and gathering community; plant cultivation and agriculture probably did not arrive until about 10,000 years later....