Editor's Note:
July 1, 2016, marks the 10th anniversary of the official opening of the Qinghai-Tibet Railway. Over the past 10 years, the railway, also known as the “Sky Road”, has boosted the regional economy by transporting more than 100 million passengers journeys and over 500 million tons of goods and materials. The 1,956-kilometer-long railway reaches from Xining, capital of Qinghai Province, to Lhasa, capital of the Tibet Autonomous Region. Photos: CFP
A woman clothed in traditional Tibetan wear smiles as she touches the Lhasa to Lanzhou train on July 1, 2006, the day the Qinghai-Tibet Railway became fully operational. 
Passengers stream out from Lhasa Station. 
A train passes by Cuona Lake along the Qinghai-Tibet Railway. At an altitude of 4,650 meters, Cuona Lake is the highest freshwater lake in the world, and is considered a holy lake by local residents. 
A freight train travels under the shadow of the Yuzhu Mountain in Qinghai Province. 
A passenger at Xigaze Station in Tibet prepares to board the train. 
A train crosses the Lhasa River Bridge in Lhasa, Tibet. 
A train attendant helps a passenger with their oxygen device. Trains running on the Qinghai-Tibet Railway are equipped with an oxygen supply system to prevent passengers from suffering from altitude sickness. 
Passengers look out the window as they travel on the Qinghai-Tibet Railway. 
A train travels on the Yangpachen section of the Qinghai-Tibet Railway in Tibet. 
Tibetan residents gather to attend the track laying ceremony in Amdo county, Tibet, on June 22, 2004. 
The first section of track is laid in Amdo county on June 22, 2004, representing the first railway to be built in the history of Tibet. 
Workers on the Qinghai-Tibet Railway carrying oxygen tanks in Fenghuo Mountain Tunnel in 2003.
