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A total of 31 pottery kilns were found at the Chengyan ruins in the county-level city of Lingbao, which is under the jurisdiction of Sanmenxia city, Henan province.[Photo/Xinhua]
Archaeologists in Central China's Henan province have unearthed a cluster of pottery kilns dating back more than 6,000 years to the Neolithic period, including one representing the highest level during that period.
A total of 31 pottery kilns were found at the Chengyan ruins in the county-level city of Lingbao, which is under the jurisdiction of Sanmenxia city, said Wei Xingtao, deputy head of the provincial institute of cultural relics and archaeology.
Among the kilns, the most advanced was a vertical-chamber type, with 11 round burners at the bottom, Wei said.
"With an intact structure including the vent, the firebox and the grate, the kiln was found to be one of the best preserved of the early stages of Yangshao culture," he said.
Dating back 5,000 to 7,000 years, the Yangshao culture was a Neolithic culture existing along the middle and lower reaches of the Yellow River. Relics discovered from the time include colorfully painted pottery.
According to Wei, most kilns at the early Yangshao culture period that were previously found, were a horizontal-chamber type with smaller sizes and simpler structures.
Compared with the horizontal-chamber type, the vertical-updraft type not only improved the exergy efficiency but also ensured a better quality of pottery product, making them more solid, he said.
Archaeologists in Central China's Henan province have unearthed a cluster of pottery kilns dating back more than 6,000 years to the Neolithic period, including one representing the highest level during that period.[Photo/Xinhua]
He also said the application of the fire grate, or a shelf with the fire under it, enabled the pottery to be burned by the outer flame with a higher temperature, which further improved the exergy efficiency.
The design of a fire grate was common in later times of the Longshan culture some 4,000 years ago and dynasties of Shang (1600 BC-1046 BC) and Western Zhou (1046 BC-771 BC), but was rare during the Yangshao culture, Wei said.
The excavation started in 2019 when a railway line was designed to run through the nearby area and is jointly carried out by the provincial institute of cultural relics and archaeology, the Sanmenxia Municipal Institute of Cultural Relics and Archaeology and the Cultural Relics Protection and Management Institute of Lingbao City.
Most of the potteries excavated are red-colored, with a small number of brown and grey ones. The potteries are mostly addorned with rope-style decorative stripes, with some black- and colored-belt stripes and triangle stripes.
To date, an area of more than 4,600 square meters has been excavated, the largest excavation project for the ruins of the early stage of the Yangshao culture.