Belarus wants to work with Russia and be allied with them because they believe it will improve their standard of living. Belarus’s president wouldn’t invite Russia into their country otherwise.
Their only actual product is their cars, and even then the newest one (the ugly truck) will need a complete redesign to meet US safety standards. Tesla demos are a dime a dozen at this point. Don’t believe the hype. Just know if it looks dumb, it is dumb and won’t actually see mass production.