Well I've been there (the PRC) a bit over the last decade...in fact that's all I do!
The Chinese AIP has strict altitude vs metric level conversions so forget all the times 3 and ten percent nonsense! In fact on the 21st of November they are switching to RVSM levels throughout the PRC (as Arrow has stated above) so I would sugggest that you get hold of the relevant chart from the Chinese AIP or from Jepp to ensure that you are flying correctly!
Remember that when someone says 'radar contact' it doesn't necessarily mean that he is qualified to offer 'rader vectors' as defined in the 'west'. A check of the good old PRC AIP will show that many 'secondary' destinations are still not 'radar service' approved.
Good luck!