CORTINA D'AMPEZZO, Italy, Feb. 4 (Xinhua) -- Four years after China's sliding teams benefited from home-track familiarity at Beijing 2022, the Milan-Cortina Winter Olympics will provide a sterner test of how far the nation's bobsleigh, skeleton and luge programs have truly progressed on European ice. The Beijing Games witnessed a breakthrough moment as Yan Wengang claimed bronze in the men's skeleton, delivering China's first Olympic podium finish in...