China and Sweden are juxtaposed here to show the global extent of Hollywood’s influence. Someone from the outside of the country wouldn’t see the bad involved with Hollywood, only the glorious lives that the actresses live.
One theory is that this line refers to Greta Garbo, a Swedish actress who moved to the United States to pursue a career. She became famous while there were still silent films, and maintained her popularity until sound was starting to be introduced. So her stardom led to girls all the way over in Sweden waiting to hear her voice from the big screen, an example of the impact of Hollywood. There are also other Swedish actresses that fit this description, like Ingrid Bergman.
This could also be a reference to all the Swedish girls coming to the states hoping to start an actress career that ended up failing and becoming porn stars. Swedish porn ended up getting pretty big.
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