Can I get tickets online without an ID card?

You can pick up the tickets. There is a short message to get the ticket code, but you still need your ID card to pass the security check. But if you have a copy of your ID card, driver's license or passport, you will generally be accepted. If not, there is an alternative office in temporary id card. Anyway, once my ID card expired, I reissued it at home. I didn't bring my ID card on the train, so I must be sincere, provided that my ID card is reissued or lost.