The 'de Havilland Jet Dragon', as the HS125 was originally known, has a sort of Chinese angle to it - maybe they'll come back, pick up that model alone, re-name it the '125 Jet Dragon' and bang them out at half the cost Wichita ever could. A new 125-800/900 (and why not re-build the 1000 whilst they're at it) with a better wing, latest engines, avionics at say US$8-9m would wipe the floor in the value for money stakes with proven pedegree, loads of support infrastructure already globally etc. etc., masses of type rated pilots everywhere, loads of flight simulators.... Fuji Heavy Industries (Japan) could build the new wing which would make sense.
No-brainer. Trouble is, it was hard enough transfering knowladge and skills from Chester (UK) to Wichita when BAe flogged it. Doing the same again to China is a whole different ball-game.
It's all built by hand with quirky assembly requirements.
Ideally, fly them over green though to Little-Rock still and have those boys do the decent besppoke interiors, whilst more utilitarian 'standard' finish cabins could be completed in China.
The basic airframe is ideal for hard-working special variants in military or utility roles for several decades.
No doubt nobody will have the balls and the ambition in this economic climate though to take up what would be a massive, scary challenge.
And as for global ceertification requirements, that would just about kill anything dead with red tape and delays.
The Hawker 4000 was originally the Hatfield-BAe-developed 'NBJ' for which a fulll-scale mock-up existed 20 years before the wretched thing came out of production and certification. Almost as bad as Sweringen's SJ30 gestation period. Good aeroplane killed by ridiculous delays.