如果是travel pass，那么在有效期里随便乘瑞铁，不需要订座买票的，（国际列车和冰川线除外） You do not need seat reservations for 99% of all trains and buses in
Switzerland. You can simply board with your Swiss Travel Pass.
Exceptions are some international trains and some panoramic trains like
the Glacier Express and Bernina Express.
If you need, or want, seat reservations, you need to arrange for them
separately. Seat reservations are not included in the pass. 至于你这个半价卡，我不知道是啥玩意儿。不过既然是半价，那就肯定要买票的，买票才能半价。