As McDude notes, there are changes to HK airspace in late October, however the main routes affected are those from SIERA, SIKOU and IDOSI. Over the last two years there has been a change in slant in traffic, to the extent that these three routes now generate over 36% of the traffic, whereas previously it was 34% (big deal I hear you say). As far as departures to the East, the standard is to climb outbounds to 9000' and hold inbounds at FL110 until passing achieved. This ensures 2000' sep when the QNH is 1013 or greater, and better than 1000' when QNH is lower. IT is expected that in time more HK traffic will be to/from China (so more SIERA) and less East (Taiwan)