![](http://www.ecns.cn/hd/2021/04/27/c57b08ad18e143199234b33e7406237f.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
Some 1,000 Chinese workers on Monday night managed to upgrade the high-speed railway by installing a new railway junction in less than seven hours. The construction, which is a key project of a mega water diversion project taking water from the Yangtze River to the Huaihe River, connects a newly-built line with the existing railway line.
![](http://www.ecns.cn/hd/2021/04/27/9799d24d2b0e4bb1ab0b1cf157ff4c82.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/b3fb7f149b1b4041abefc0d34b285652.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/9d1a8bde7ca74dd1a87134722adb121a.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/70041d74900d474faecd33f58fff179f.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/d6c5d82589a141e084129e3637667f6b.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/a2322db190f84d74a7c58d99f1d66332.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/f25b82df703f4d8d85950006e6ed7dc1.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)
![](http://www.ecns.cn/hd/2021/04/27/7a37b52f6710483d912eb09d5c757d80.jpg)
Railway builders work overnight to apply track upgrade of Shanghai-Chengdu high-speed railway in east China's Anhui Province, April 26, 2021. (Xinhua/Liu Junxi)