who told you they only built 30 Z-8s in 30 years?1. The traditional think of a "Great Army" in PLA, here Army means Land Force only, and sometime even means Soldier on FOOT only. So,any flying toyes are threats to those generals' 'baby'--Tanks and Guns. (Even sometime, any machine is not thought to be reliable,only men and their guns are trusted). Heli? Cut them off and we need more tanks.
2. Then talk about Air Force. From AF's eyes, any thing flying should be controled by AF. So, Army's wing? they are threat, and cut them off.
3. Low level air space is not open to public, so few civil aviation of heli.
4. The Aero-industry,
Z-6 failed because of no proper reliable engine.
Z-7 abandoned for Z-8, and engine is problem.
Z-8 reverse-engineered for thirty years and in this thirty years built less than 30! Engine and transmission are problems too!!!
Z-9 lisenced built, and what a pity, engines and transmissions still still met so many problems......
Z-11, even PLA do not like it, they profer HC-120.
So, most of their Heli have to be imported.
Production rate from 2005 to 2007 are 9, 12 and 15. That's just the last 3 years. How else do you think they managed to get 2 Z-8K regiments out there? The problem right now with Z-8 is the cost, so it probably will only serve in SAR or naval role in the future.
There is nothing wrong with Z-9s either. They've got the engine situation sorted out. They were producing as many as 7 per month a while back. Not sure what the production rate is now.