Interesting. It's too bad a majority of workers were scared enough to vote against a union :(
They were definitely exposed to all the same tricks, firing of pro-union workers, intense propaganda sessions (the very same stuff we were fed by Lionbridge and is fed everywhere), sudden $2 pay raise (look at what you could lose) etc... :( . At the end it's a 'classical' but not often showed in movies story of capital vs labor.
There are many reviews if you google American Factory. I selected this article published before the film. Of course, workers would be better off with a union and the company would still make a profit (as we all know and as they already are). Hopefully it will happen asap. Later I found this by Jon Talton for the Seattle Times.
I looked a bit more at Fuyao: they just bought a plant in Germany (that had gone bankrupt). Wondering if they have unions there. Here about labor protests in China now and in the past.