Interesting! Thanks for the link.
Never heard of Chongqing Haray but I think you've identified the head I asked about.

It seems that no matter how expensive the head it still has to be checked 100% and probably some things repaired or resized. Even the high-dollar ones have been known to have water leaks, bad seats, etc.

So I'd just as soon buy bare heads cheap, and expect a shop to check/redo the valve seats & guides, do some mild porting, then put my valves, Comp springs and 10 degree locks on.