Article continues below advertisementWhen a Hollywood director shows up on a presidential foreign policy trip, it's no longer just about trade talks.Brett Ratner's inclusion in President Donald Trump's delegation to China - alongside figures like Elon Musk, Tim Cook, and Larry Fink - has turned what would traditionally be a tightly scripted diplomatic visit into something closer to a cultural crossover moment.Officially, Ratner is there to scout locations for Rush Hour 4, which is expected to film in China next year.