A large number of relics of the Yangshao Culture dating back 5,000 to 7,000 years have been discovered at the site, said Gu Wanfa, director of the Zhengzhou Municipal Research Institute of Cultural Relics and Archaeology, at the press conference.

"The important archaeological findings prove the representativeness and influence of the Heluo area in the golden stage of the origin of Chinese civilization around 5,300 years ago," said Wang Wei, a member of the Chinese Academy of Social Sciences.

Since 2013, the Zhengzhou Municipal Research Institute of Cultural Relics and Archaeology and the Institute of Archaeology of the Chinese Academy of Social Sciences have conducted continuous archaeological excavations on the site.

According to archaeologists, the Shuanghuaishu site was about 1,500 meters long from east to west and 780 meters wide from north to south. It was surrounded by three ring trenches with each found to have external access, forming a strict defense system.