"Ctrip complaint telephone number is how many, why can't it be returned before departure within 3 hours of buying tickets?"

The Ctrip customer service phone number is 95548. As for the question about why you can’t cancel a ticket within three hours of departure, according to Ctrip’s policy:

• If the flight/train/hotel booking has not been refunded or cancelled, and it falls within the “no-refund” time frame (usually within three hours before departure), there is no option to refund or change.
  However, if you have already checked in online for a flight ticket, you may still be able to cancel or modify your ticket by calling Ctrip’s customer service center.