Lawrence,
About BAM, there stills seems to be a company called Beijing BAM Co Ltd, owned by Beijing SASAC:
http://www.hoovers.com/company-infor....html?aka_re=1
It also has a website, which I visited a while ago, but now only returns an 403 error.
http://www.bjbam.com/
When I did access that website, their company history section more or less ran a short version of the Beijing Automobile Works history. They said they were now a auto parts and components manufacturer, mainly air conditioners and radiators.