Urgent! Wharton Shanghai interview time slot is not available, what can I do?

I just got the invitation of interview from Wharton. Unfortunately, it shows "No Shanghai Interviews time slots are available. More may be added at a later date, otherwise you may want to use other interview options. " when I chose the Shanghai hub interview.  What can I do now? Just wait to get the hub interview chance?

Your comments and suggestions are welcome. Thanks a lot!

wait for the hub interview in Shanghai or go to HK for alumni interview.