Of course this would all be academic if China fell into step with the rest of the World and adopted FL/feet as the universal "standard".
Its kind of funny but their metric RVSM FLOS is based on feet.
Q: "I have a metric altimeter, can I fly through your metric airspace?"
A: "Cannot. To fly through our metric airspace you must fly in feet." (!)
Hence everybody is using a conversion table from "spoken" metric level to feet.
Not the pilot, nor the controller in China, nor the controller in HK actually see the cleared level, as spoken, on any screen or instrument. They see either an approximate conversion to feet, or an actual metric level (in the case of the Chinese controller's radar screen) which is not exactly the same as the spoken clearance due to the conversion to feet in the table.
Clear as mud??
Conflict alarm goes off - quick, what metric level are you maintaining? Er, um. Standby.