High amount variance of quality is a daily reality and as any chinese consumer we are very used to that since the beginning of e-commerce. However there are multiple aspects to the quality feel. Production of high quality items is one thing (e.g one can do better QA etc), what I heard from some local car garages in China is that standardisation in the industry is still quite poor. E.g Parts to replace and bolts and nuts are not as standardised say as the German counter parts (purely from a mechanics point of view).

Having said that a lot of German car suppliers are in China, and the German car manufacturing industry evolved over a significantly longer period of time.

A really good example of this is the luxury watch market. China manufactures a heap of shitty knockoffs. They also manufacture a heap of the high end legitimate brand watches. And they manufacture some nice and obscenely expensive high end luxury watches.