The Yiwu - Madrid Railway line is a goods railway line from the Chinese city of Yiwu to the Spanish city of Madrid, a distance…

“The Yiwu - Madrid Railway line is a goods railway line from the Chinese city of Yiwu to the Spanish city of Madrid, a distance of roughly 10,000 kilometres (about 8,111 miles), 741 kilometres more than the Trans-Siberian Railway, the longest until now. It is a major component of the New Eurasian Land Bridge.”

https://en.wikipedia.org/wiki/Yiwu_-_Madrid_Railway_line