Chinese archaeologists have released details of a cluster of building ruins in east China's Zhejiang Province, believed to be related to the ancient capital of the Yue Kingdom, which preceded the Qin Dynasty (221 BC-207 BC).

The experts have been conducting excavations at 10 large-scale sites in Shaoxing City of Zhejiang since 2020, unearthing the remains of large buildings and various ancient artefacts of great significance for future research.

The cluster covers a total area of some 7 square kilometers, and includes the three main sites of Tingshan, Nanshan and Nanshantou. They are located close to the royal mausoleum of the founder of Xia Dynasty (2070 BC-1600 BC).

Among the most significant finds was a 180-cm-thick layer of building remains located at the top of Tingshan Mountain, at the core of the cluster, according to Xu Xinmin, researcher from the provincial institute of cultural relics and archaeology, who is in charge of the overall excavation project.

Some quay ruins and pits for ritual ceremonies containing the remains of sacrificial offerings were also found at the Tingshan Site, said Xu.

In the southern part of the Tingshan Site, a massive building foundation was unearthed, with delicate lacquer decorations painted on the remains of the pillars. Xu explained the building is believed to have been a high-grade public ritual space at that time.

Meanwhile, some platform-like foundations were unearthed at the Nanshan Site, containing abundant pottery, primitive porcelain, metal-ware, bamboo and wood-ware, as well as animal and plant remains.

Notably, multiple items of bronze-ware, including a spear and a dagger-axe, both with character inscriptions indicating the king, as well as seven swords, were also discovered at the Nanshan Site.

The bones of cattle, pigs, deer and freshwater fish were also found at the site. Surprisingly, rare bones of horses from the Yue Kingdom and tuna bones, which can only be found in the deep sea, were among the remains. The remains of crops, vegetables and fruits have also been found, according to Xu.

At the Nanshantou Site, researchers found a huge tile, which is 48-cm-long and 36-cm-wide. The tile illustrates the magnificent scale of the building at the site, Xu added.

Based on the new findings, the researchers have come to a preliminary conclusion that the main three sites -- namely Tingshan, Nanshantou and Nanshan -- are interlinked to form a functional area for the core region of the Yue Kingdom, and may have belonged to the kingdom's capital.

Known collectively as the Tingshan complex, the sites are expected to reveal the social organization structure, subsistence economy, transportation, trade and other social-life conditions before and after the establishment of Yue Kingdom, taking into account the swampy environment at that time, with mountains facing the sea and rivers criss-crossing its territory, according to Xu.

Luo Rupeng, a researcher with the same institute as Xu, said the discovery of the Tingshan complex is very important for the archaeological study of the Shang and Zhou dynasties (1600 BC-256 BC) in Zhejiang.

Local archaeological research authorities, including Zhejiang provincial institute of cultural relics and archaeology, have been conducting excavation work at the sites since 2020, with an accumulative excavation area of more than 20,000 square meters so far.