![](http://www.ecns.cn/hd/2019/12/23/bfe5412fc6d34545aca58ebbdb4ba515.jpg)
An archaeologist (2nd L) explains the structure of pottery pipes that compose a drainage system discovered at the Langyatai ruins in the city of Qingdao, east China's Shandong Province, on Dec. 21, 2019. A drainage system dating back to the Qin (221-206 BC) and Han (206 BC-220 AD) dynasties was discovered at the Langyatai ruins. Excavation started on two sites at the ruins in October this year. So far, an earth platform foundation, a drainage system, and a building base, which are on a grand scale and boast rigorous architectural crafts, have been discovered. (Xinhua/Li Ziheng)
![](http://www.ecns.cn/hd/2019/12/23/ba1c7e8d15d046e1b3d77386f5d458f2.jpg)
An archaeologist explains the progress of archaeological excavation works at the Langyatai ruins in the city of Qingdao, east China's Shandong Province, Dec. 21, 2019. A drainage system dating back to the Qin (221-206 BC) and Han (206 BC-220 AD) dynasties was discovered at the Langyatai ruins. Excavation started on two sites at the ruins in October this year. So far, an earth platform foundation, a drainage system, and a building base, which are on a grand scale and boast rigorous architectural crafts, have been discovered. (Xinhua/Li Ziheng)
![](http://www.ecns.cn/hd/2019/12/23/620fbdc02dcc4bfdad5f00ff1c25d4c9.jpg)
Photo taken on Dec. 21, 2019 shows an archaeological excavation site at the Langyatai ruins in the city of Qingdao, east China's Shandong Province. A drainage system dating back to the Qin (221-206 BC) and Han (206 BC-220 AD) dynasties was discovered at the Langyatai ruins. Excavation started on two sites at the ruins in October this year. So far, an earth platform foundation, a drainage system, and a building base, which are on a grand scale and boast rigorous architectural crafts, have been discovered. (Xinhua/Li Ziheng)
![](http://www.ecns.cn/hd/2019/12/23/47904e2ebf3c4215af18874a62300f2d.jpg)
Photo taken on Dec. 21, 2019 shows pottery pipes that compose a drainage system discovered at the Langyatai ruins in the city of Qingdao, east China's Shandong Province. A drainage system dating back to the Qin (221-206 BC) and Han (206 BC-220 AD) dynasties was discovered at the Langyatai ruins. Excavation started on two sites at the ruins in October this year. So far, an earth platform foundation, a drainage system, and a building base, which are on a grand scale and boast rigorous architectural crafts, have been discovered. (Xinhua/Li Ziheng)
![](http://www.ecns.cn/hd/2019/12/23/62c3ad0ab3d043aca92385404ae4cfa0.jpg)
An archaeologist explains a stone-paved path discovered at the Langyatai ruins in the city of Qingdao, east China's Shandong Province, on Dec. 21, 2019. A drainage system dating back to the Qin (221-206 BC) and Han (206 BC-220 AD) dynasties was discovered at the Langyatai ruins. Excavation started on two sites at the ruins in October this year. So far, an earth platform foundation, a drainage system, and a building base, which are on a grand scale and boast rigorous architectural crafts, have been discovered. (Xinhua/Li Ziheng)
![](http://www.ecns.cn/hd/2019/12/23/fd8e0daebd1041c49c0379fe977aa832.jpg)
Photo taken on Dec. 21, 2019 shows a drainage system composed of pottery pipes discovered at the Langyatai ruins in the city of Qingdao, east China's Shandong Province. A drainage system dating back to the Qin (221-206 BC) and Han (206 BC-220 AD) dynasties was discovered at the Langyatai ruins. Excavation started on two sites at the ruins in October this year. So far, an earth platform foundation, a drainage system, and a building base, which are on a grand scale and boast rigorous architectural crafts, have been discovered. (Xinhua/Li Ziheng)