Re: So you want a trade war, eh?
If you're a 'merkan then you'll know it as a trade war. The Trump administration went full tilt at various Chinese technology companies with Huawei being just the tip of the iceberg. Its been open season on the Chinese here -- not a day goes by without the obligatory negative media article(s), the "informed speculation" and just to garnish the mess the FBI has been harassing Chinese citizens, typically researchers in US universities who are, obviously, all spies.
In this atmosphere its not surprising that there would be a bit of Chinese pushback. It seems like more of a 'work to rule' rather than a strike, to use a labor analogy.