Transforming winter chill into economic heat in north China's Inner Mongolia

HOHHOT, Jan. 5 (Xinhua) -- When life retreats from the bitter cold, the frozen lake in Yakeshi, north China's Inner Mongolia Autonomous Region, comes back to life with the revving of engines, morphing into a vast test track where the world's carmakers confront nature's most extreme conditions.

The giant slab of ice covering the lake in the Miandu River National Wetland Park of Yakeshi, in Hulun Buir City, has bec