We have been sourcing electronic components from China for certain USA clients for the last 25 years, and have learned a few things..
China has the knowledge knowhow and capability to build quality parts but...
Often shortcuts are taken due to:
* Complaints from the buyer to make cheaper
* Inexperienced sources
* Low quality materials, mainly recycled garbage
Within the Chinese culture is their motivation to make things faster and cheaper, and this is why U will find low quality, marginal parts.
The only secure way to get good quality is to work with established sources and to have your own QA inspection teams.
We have been dealing with certain factories for many years and they know very well how to make quality components.
Unfortunately in today's market the major push is for price so the end-result are components that don't fit right and/or only last a short time.
Sad but true...
Just my $0.02..
