Shenzhen Airlines chooses seats several days in advance.

Two days. According to Kumi. Shenzhen Airlines provides international and domestic air ticket reservation, special air ticket reservation, flight dynamic inquiry, air ticket return and change, online check-in and online seat selection services. The seat selection service can select seats two days in advance, and the photo seat selection can be 1 hour in advance, which must be completed at least 45 minutes before the flight takes off. Shenzhen Airlines Co., Ltd. was established in June of 1992 and June of 10. It is an airline jointly invested by Guangdong Guangkong Group Co., Ltd. and China International Airlines. September 1993 officially set sail, and it is an airline located in Shenzhen, Guangdong.