Yes, it is possible to get passover pay. Look closely at the HKG 767 training letter and you may find one or two.
As Nocturnalmishun pointed out, the likelihood is very low.
Cause factors could be a large overage in the 75CA seat that he is leaving, or in the case of CGN, time to get outta Dodge for tax purposes.
HKG has issues because many current HKG CA bid back to the H76CA, yet the company has to keep enough pilots out there to operate the Buses until the Boeings are in place and manned enough to operate on their own.