@taxiya- a poster (Franklin) said he thought the Z-20 team didn't post pictures because its members might be too embarrassed about copying the Blackhawk, and I offered an alternative explanation. At no point did I claim it was the correct or the only alternative, and others have opined with additional reasons.
When it's all said and done, SDF is a discussion forum where different, and hopefully reasonable, views compete in the free market of ideas, and the good ones move on to the next rounds, while the bad ones don't. Yes, I'm just as guilty as some others here on occasionally taking things too seriously, but like Sigmund Freud said: "sometimes a cigar is just a cigar."
It depends on how certain ideas are phrased, what kind of logic and premises they rest on, and using critical thinking to interrogate it all.
Based on the information we have at present, and what we know about past and present PLA practices regarding opsec, the explanation suggested by Taxiya seems the most likely... or at the very least, we do not have enough information to know what stage or how successful the development of Z-20 is going for us to explain its absence of photos as being due to slow development.
By the way, I also like how you're using the name "copyhawk" in such a casual way. Now, I myself am not bothered by it, but others in future might be, given sensitivity surrounding stereotypes of China copying etc, and they might criticize you for it. Continue using the name by all means, but just appreciate that some people might not receive it very well and will have the right to interpret it as mildly inflammatory.