Originally Posted by
gbyal
I have been able to do this through the Shenzhen Airlines website even though I booked through a third-party, although I had to go through the Check-in and seat selection menu instead of the "My booking" menu that I first tried to use but it couldn't find the booking.
Is the website
https://global.shenzhenair.com/zhair.../chooseLan.do? I go through Seat Selection Check-in menu. It asks for "ID card number that you entered when booking tickets". Do you know what ID card number should I use?