![](http://www.ecns.cn/hd/2022/08/17/e5d96cf86ed24157b708ee2eb8adadbe.jpg)
The Jiuwandashan No. 4 tunnel on Guiyang-Nanning high speed railway is drilled through in Hechi City, south China's Guangxi Zhuang Autonomous Region, Aug. 17, 2022. (Photo: China News Service/Wang Yizhao)
The Guiyang-Nanning high speed railway is expected to start operation at the end of 2023 with a designed speed of 350 kilometers per hour.
![](http://www.ecns.cn/hd/2022/08/17/588fd6f115b044a8b3732d68ee4bd2cd.jpg)
The Jiuwandashan No. 4 tunnel on Guiyang-Nanning high speed railway is drilled though in Hechi City, south China's Guangxi Zhuang Autonomous Region, Aug. 17, 2022. (Photo: China News Service/Wang Yizhao)
![](http://www.ecns.cn/hd/2022/08/17/2ba3c0bf5d624ec3b44cd0ec7b36c57c.jpg)
The Jiuwandashan No. 4 tunnel on Guiyang-Nanning high speed railway is drilled though in Hechi City, south China's Guangxi Zhuang Autonomous Region, Aug. 17, 2022. (Photo: China News Service/Wang Yizhao)
![](http://www.ecns.cn/hd/2022/08/17/6306306452084727adc9ee78fa95ce15.jpg)
Construction workers work at Jiuwandashan No. 4 tunnel on Guiyang-Nanning high speed railway in Hechi City, south China's Guangxi Zhuang Autonomous Region, Aug. 16, 2022. (Photo: China News Service/Jiang Xuelin)
![](http://www.ecns.cn/hd/2022/08/17/2c3deecea63a4087b6b702173b38852b.jpg)
Construction workers work at Jiuwandashan No. 4 tunnel on Guiyang-Nanning high speed railway in Hechi City, south China's Guangxi Zhuang Autonomous Region, Aug. 16, 2022. (Photo: China News Service/Jiang Xuelin)