买高铁票，车次后面的静和雪代表什么？

Group 1 - The core service "Quiet Carriage" will expand to include more train types, allowing for over 8000 trains to offer this service starting February 1 [1] - The "Quiet Carriage" service aims to adjust audio levels and guide passenger behavior for a quieter travel experience [1] Group 2 - The "Ski Equipment Convenience Service" allows passengers to carry ski equipment on specific high-speed trains, ensuring synchronized arrival of passengers and their ski gear [3] - Currently, this service is in trial operation on certain routes, including the Beijing-Zhangjiakou high-speed line and some trains in Northeast China [3]