Can you take the transfer from hong kong international airport to shenzhen airport if you fly cathay pacific?

Hi, Jasmine.
What kind of method do you use?
If you use the buses, there is no limitaion on the airline company. No matter what airline company you use, you can use the bus to transfer.

If you plan to use the ferry, your airline company is available and the luggage can be transfer by the automatic, so you do not need to collect your luggage.