Worth considering at least, and looking at approaches like you mentioned and avoiding allowing free entry of foreign vehicles. We could consider partnerships (if China is interested) like we have with other foreign manufacturers like Honda and Toyota. We should also be considering expanding the existing relationships, though I'm sure there are retooling costs, and possibly playing hardball with other manufacturers to encourage them to setup shop (e.g. Kia/Hyundai).
I doubt I'm offering anything that hasn't been part of discussions already, but having the ability to manufacture vehicles seems like an area of industrialization a country shouldn't part with lightly.