Photo taken on June 29, 2009, shows soldiers of the Third Detachment of the Armed Police of Qinghai Province patrolling the Sanchahete Bridge of the Qinghai-Tibet Railway in northwestern China's Qinghai Province. Officers and soldiers have been patrolling the railway for three years braving all kinds of adverse weather on the plateau of more than 4,000 m above sea level. For their efforts, the railway has ever been in safe condition with not a single occurrence of accidents, photo from Xinhua.
 
Photo taken on June 29, 2009, shows soldiers of the Third Detachment of the Armed Police of Qinghai Province patrolling the Mt. Kunlun Tunnel at an altitude of 4772 m on the Qinghai-Tibet Railway, photo from Xinhua.
 
A train on the Qinghai-Tibet Railway passes the Sanchahete Bridge in northwestern China's Qinghai Province, June 29, 2009, photo from Xinhua.
 
A soldier of the Armed Police of Qinghai Province is on duty in a watchtower of the Sanchahete Bridge in northwestern China's Qinghai Province, June 29, 2009, photo from Xinhua.
 
Officers and soldiers of the Armed Police of Qinghai Province guarding the Mt. Kunlun Tunnel of the Qinghai-Tibet Railway take oxygen in their barracks, June 29, 2009, photo from Xinhua.