As pure speculative names you'd probably do best with a market that attracts crossover traffic for the language of the words in the domains. You might find some interest in the domain forums that also act as domain marketplaces: DNForum, DState, NPros.
Of course, in domain forums, you can expect to receive offers that are either a)pure traffic pricing; or, b) 1/10 or less of the estimate of aftermarket sales price.
Can't say I'm aware of a robust market for .com.cn and net.cn domains. I'd be interested to read where - if anywhere - such domains are routinely sold in the aftermarket AND if there's an reliable reports of recent sales.
Accurate data on this issue won't be dealt with as spam but as educational material, so post up what you know - just minimize the urge to sound promotional (if that's anyone's ilk :) )