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Photo taken on July 5, 2022 shows a pipe system at No.3 ancient building of the Yueyang archaeological site in northwest China's Shaanxi Province. (Photo provided to China News Service)
A flush toilet dating back to 2,400 years was unearthed at the Yueyang City Ruins in Shaanxi, marking the first and only flush toilet to be ever unearthed in China.
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Photo taken on Aug. 22, 2021 shows a remain of a tile unearthed from the Yueyang archaeological site in northwest China's Shaanxi Province. (Photo provided to China News Service)
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File photo taken on Nov. 29, 2021 shows the Yueyang archaeological site in northwest China's Shaanxi Province. (Photo provided to China News Service)
![](http://www.ecns.cn/hd/2023/02/16/4d627176d3644e9295ad52b5fcc90533.jpg)
File photo taken on Oct. 3, 2021 shows a remain of a tile with plant pattern unearthed from the Yueyang archaeological site in northwest China's Shaanxi Province. (Photo provided to China News Service)