for Korean

Im Korean and I suddenly decided to go to Shenyang to visit my friend.
I do not have enough time to apply for the visiting visa.
Is it possible to get VOA?

Another concern is that I will stay 3 days and less than 72 hours . But I hold return ticket on leaving within 72hours.
the problem is that the ticket is staff ZED ticket so it's not confirmed ticket even there are many seats available.
do you think I can get a within 72 hours free transit?