4th Congress of Chinese Archaeology kicks off in Xi'an, NW China

A foreign expert listens to a speech during the 4th Congress of Chinese Archaeology in Xi'an, northwest China's Shaanxi Province, Oct. 23, 2023. Over 800 archaeologists attended the 4th Congress of Chinese Archaeology that kicked off here on Monday. (Xinhua/Li Xin)

Gao Jiangtao, a research fellow with the Chinese Academy of Social Sciences, speaks during the 4th Congress of Chinese Archaeology in Xi'an, northwest China's Shaanxi Province, Oct. 23, 2023. Over 800 archaeologists attended the 4th Congress of Chinese Archaeology that kicked off here on Monday. (Xinhua/Li Xin)

Participants look on as image of three-dimensional digital technology is shown outside the meeting hall of the 4th Congress of Chinese Archaeology in Xi'an, northwest China's Shaanxi Province, on Oct. 23, 2023. Over 800 archaeologists attended the 4th Congress of Chinese Archaeology that kicked off here on Monday. (Xinhua/Li Xin)

The opening ceremony of the 4th Congress of Chinese Archaeology is held in Xi'an, northwest China's Shaanxi Province, Oct. 23, 2023. Over 800 archaeologists attended the 4th Congress of Chinese Archaeology that kicked off here on Monday. (Xinhua/Li Xin)

Participants listen to a keynote speech during the 4th Congress of Chinese Archaeology in Xi'an, northwest China's Shaanxi Province, Oct. 23, 2023. Over 800 archaeologists attended the 4th Congress of Chinese Archaeology that kicked off here on Monday. (Xinhua/Li Yibo)