Archaeologists clear a tomb at the excavation site. [Photo/Xinhua]

In addition, archeologists also excavated a relic of the Neolithic Age, with an area of about 150,000 square meters, one of the few ruins which have remains dating back to the Paleolithic age in China.

According to Ma Mingzhi, associate researcher in Shaanxi Archaeological Institute, the Longgang Temple Ruins were discovered in the 1980s. However, they only found 430 tombs of the Neolithic Age at that time.