Border soldiers keep patrolling on mountains at an altitude of 5,895 meters in Ngari Prefecture in Southwest China’s Tibet Autonomous Region, Jan. 22, 2017. Temperatures dropped to minus 25 degrees centigrade. (Photo/CFP)
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Border soldiers keep patrolling on mountains at an altitude of 5,895 meters in Ngari Prefecture in Southwest China’s Tibet Autonomous Region, Jan. 22, 2017. Temperatures dropped to minus 25 degrees centigrade. (Photo/CFP)