Looked at china dozers about 97 shantui i think was the name, built Komatsu d 65-8 and d85-12s, Have a video someware, shows them in action on a large dam site, the 85s pulling pans . then shows the fsctoy and manufacture, factory set up by komatsu i think?
lots of automatick machinery, but from memory the shots of workers no health and safety.The track plant was seperate all automated and came from germany.
Some observations from workeding on china machinery over the years from ag tractors to scooters
All look good when new , but give them a couple of years, they dont look so good.
Electrical systems and switchgear are poor, paint and plastic fade quickly
castings have got bbetter over the years and are less crude.
bolts and nuts made of taffy, except the ones that brake off in a blind hole. the will have a lump in the middle that is super hard and will send the drill sidways into the casting.
parts are cheap but they need to be when you have the gearbox apart to replace the gears and shafts they forgot to harden.
The bigest thing to me is a d6d cat still fetches good money
What is your china d6d going to be worth in five years time , if you can find a buyer?