World Beijing expands massive subway system April 2, 2014 / 2:34 PM EDT / CBS News Kevin Frayer/Getty Images Chinese workers eat lunch and rest at the site of a new subway line in Beijing, China.The new line will be the 18th in the Beijing subway system, which has a daily ridership of more than 10 million people, according to local officials. All photos taken on March 29, 2014. Beijing, China Kevin Frayer/Getty Images Chinese workers dig out part of a small tunnel underground. Beijing, China Kevin Frayer/Getty Images Worker takes a break while digging. Beijing, China Kevin Frayer/Getty Images Chinese workers at the site of a new subway line. Beijing, China Kevin Frayer/Getty Images Worker walks on the track while working on a new subway line. Beijing, China Kevin Frayer/Getty Images Chinese worker pauses as he lays track for a new subway line. Beijing, China Kevin Frayer/Getty Images Chinese worker cuts track as they lay track. Beijing, China Kevin Frayer/Getty Images Workers lay track on a new subway line. Beijing, China Kevin Frayer/Getty Images The shadows of Chinese workers are seen on the wall as they lay down tracks. Beijing, China Kevin Frayer/Getty Images Workers laying track on a new subway line. Beijing, China Kevin Frayer/Getty Images Workers stand on scaffolding as they work at the site of a new subway line.