It took just 6 hours for this army of railway workers to change the tracks at a station in China

More than a thousand workers changed the railway tracks for a train station in only six hours in northern China.

The impressive time-lapse video, captured in Xi’an City in Shaanxi Province on January 15, shows more than 1000 workers and 20 large construction machines working on site at night.

In order to minimize the impact of the construction work to the passengers, workers started the update process from midnight and finished it at around 6:00 am the next day.