![](http://www.ecns.cn/hd/2019/11/25/0d7790dabec6420dbed8ff881b5dcccc.jpg)
Excavation at the Langyatai ruins in Qingdao City, East China’s Shandong Province. China's National Cultural Heritage Administration has approved excavation at the ruins that date back to the Qin (221- 206 BCE) and subsequent Han (202 BCE- 220 CE) dynasties. Archaeologists have discovered remains of pottery pipelines that look like a modern drainage system. (Photo/ICphoto)
![](http://www.ecns.cn/hd/2019/11/25/25ab3009df3845f0b3a772c1ad606feb.jpg)
Excavation at the Langyatai ruins in Qingdao City, East China’s Shandong Province. China's National Cultural Heritage Administration has approved excavation at the ruins that date back to the Qin (221- 206 BCE) and subsequent Han (202 BCE- 220 CE) dynasties. Archaeologists have discovered remains of pottery pipelines that look like a modern drainage system. (Photo/ICphoto)
![](http://www.ecns.cn/hd/2019/11/25/c13550469054454ab3192e2d0efe5401.jpg)
Excavation at the Langyatai ruins in Qingdao City, East China’s Shandong Province. China's National Cultural Heritage Administration has approved excavation at the ruins that date back to the Qin (221- 206 BCE) and subsequent Han (202 BCE- 220 CE) dynasties. Archaeologists have discovered remains of pottery pipelines that look like a modern drainage system. (Photo/ICphoto)