Dr Faust,
Sounds like you did really well!
My experience, albeit with Cathay, is that you don't need to be brilliant just show you have cared enough to pull your finger out. Make them believe you really want the job and that you have made some effort to get it. Sure, some of the questions, are a bit obscure but they will just be checking that you have some knowledge, can apply some common sense and are generally going to fit in. The common sense bit is quite important as Asia (china) is going to offer up many interesting challenges which you are just going to have to deal with.
When you get here, tuck on board the bit about 'make them believe you really want the job and that you have made the effort to get it' as this applies to all assessments here. You get left alone 95% of the time but for your 2 PC's, your line check and any upgrades just play the game and make some effort. Easy.
Sim check? Just do what you would do normally. If you stuff up the approach, go around! Don't land on the grass like one former colleague did because 'he thought they wanted to see a landing'.
Good luck. Enjoy Hong Kong. It can be a fabulous place to live.