At 0°C, water begins to freeze; at -30°C, kerosene begins to solidify; at -40°C, this "Snow Train" can still travel at a speed of 300 kilometers per hour—this is the world's first high-speed rail in the high-cold area, the Harbin-Dalian high-speed rail, creating the world's highest temperature difference and the most cold-resistant carriages in the world.