The first of the CRRC cars have gone into service in Boston on the MBTA Orange Line, and they are desperately needed NOW to replace an elderly fleet that is no longer reliable. By all accounts they are well-built and welcomed by riders. Personally, I am not expecting that Chinese intelligence will be interested in tracking rush hour delays out of Forest Hills or whatever. I'd say let's get real, but given the madness that infests Washington these days I no longer expect logical policy-making down there, especially as regards a manufactured feud with China.
The CRRC Orange and Red Line cars are not affected by this as they were funded 100% by the State of Massachusetts.
This is not a "manufactured feud" - the Chinese government has refused for a long time to play by the rules. Other administrations just looked the other way as US businesses offshored their manufacturing. Now the current administration is cracking down and requiring China top play nicely or else. To some extent the railcar manufacturing has been caught up in this larger dispute. China being pragmatic will eventually settle and I expect the situation to resolve itself.