You need a second-generation ID card to buy a ticket. There are many trains from 7: 00 to 2 1: 00, and there is one every half an hour. There is no need to buy in advance for holidays.
Ticket price 1, first class 28 yuan, second class 23 yuan.
Longjia airport station crosses an overpass after leaving the station, and it takes more than 10 minutes to get your luggage through the parking lot in front of the airport.