Does the Chinese factory actually manufacture the parts, or just
assemble it? If it's the former, I'm facepalming.
Assembling and testing only.
Don't go too extreme against China products. Their high
speed rails are running 350 km/h and its a daily affair.
Assembling trains that does Metro speed is peanuts compared to
that.
CSR Qingdao and Kawasaki Heavy Ind Japan as consortium is most
reliable; they did the first batch high speed rail trains for China
(CRH2) as well.
Consumer products they may face scandals but not the same can
directly be applied to hi-tech products like these. Besides its KHI
Japan which does the procurement of parts.