What time does Huaian high-speed railway station open?

Six in the morning. The operation time of the high-speed rail is from 0: 00 pm the night before to 6: 00 am the next day. Before 0 pm, after the last train in high-speed railway station leaves the station or arrives at the station, the high-speed rail staff will clean up high-speed railway station and reopen it at 6 am. However, the regulations in high-speed railway station vary from place to place, so it is better to make a decision according to high-speed railway station's notice.