Given that there is a bit more than 5 hours between CX arrival in JNB and the departure back to HKG, I would think that an immediate turn in JNB would be relatively simple.

OTOH, CX might not like nested tickets (though two one ways aren't all that much more expensive in getting to and from JNB) given the relatively low prices exJNB.

Anyone done an recent and immediate turn at JNB on CX while wandering?

Fred