Chinese soldiers from border defense regiments take physical trainings braving minus 26 degree temperature in Heihe, Heilongjiang province on December 15, 2015. Located at 50 degrees north latitude, Heihe city neighbors Blagoveshchensk in Russia across the Amur River, or Heilong Jiang. Temperature dips to as low as minus 50 C in its half-year-long winter. (Photo/CFP)
