I am not very well versed in international law or economics but I was wondering if China might hold an ace up its sleeve that might just trump Trump's trade war.
If China was to add a surcharge on all sanction goods imposed by the US and commensurate in value then this would have two effects. They would have money to pay companies affected by US actions and the conjunction of both surcharge and sanctions would jolt every American consumer into panic mode.
One immediate effect would be to clear out all the backlog that is now clogging up the distribution chain and languishing in warehouses as people rush to buy it before the price hike.
It might speed up the exodus of companies moving out of China but these companies should realise that it is expensive to move and takes time to build up a new experienced work force. Also the gap left in the Chinese market might be quickly filled by a new company employing the same workforce but with newer and perhaps more technically advanced than the old.
Perhaps Christmas this year in America will become all old retro as they go back to celebrating how they did in the past. "Chestnuts roasting around..."