There are currently 3 346s on the CX fleet. Two is required for the daily HKG-JFK-HKG nonstop. So the one left over is often deployed for various routes on different days. It is used on CX888/889 at times while it has also been used for one of the SYD flights (CX only needs one 346 to operate a HKG-SYD-HKG using this type of aicraft on a daily basis).