The expiration date depends on the ticket purchased.
1DAY TICKET
Tickets are valid for 1 day from the time you access Exhibition.
For example, if you accessed the exhibition at 11:00 on January 1, the ticket is valid until 10:59 on January 2.
You can leave and re-enter the exhibition as many times as you like within 1 day from the time you accessed the exhibition.
7DAY TICKET
Tickets are valid for 7 days from the time you access the Exhibition.