there can be local supply chains in Canada that are created out of these investments
I don't think so.
Chinese companies bring their own migrant workers - who then work under slave-like conditions as we have seen in Brazil's BYD plant last year, to name a recent example.
And they also have fully integrated supply chains, meaning they purchase their parts from Chinese suppliers.
The only thing it does is to create hurdles for Canada to rebuild its own car industry.
If Canada want to really create supply chains, it must create ventures with European, Japanese, South Korean producers.
