Just a quick information for people with short-checking issues / problems: I have been able to postpone the HKG-HAN segment before flying the first leg for 4 days (so I am basically having a 4 day stopover in HKG) which gives me the opportunitty to directly add other CX Bookings after I will be arriving from YVR to HKG without worrying about any cancellations etc. Change fee was 100 USD and fare difference USD 15 (??). Paid 115 USD in total.