• Xin Su at Tao River Valley in Gansu Province in 2018

  • Gravel layers at Tao River Valley in 2018

  • Team members of survey and excavation at Panlongcheng in 2014-2015 field season

  • Overlook of the Panlongcheng site (盘龙城遗址) in Wuhan City, Hubei Province, China

  • Xin Su (in the middle) is working in a simulation experiment of copper smelting in Beijing, 2016