Vietnam has banned all commercial screenings of Greta Gerwig's most anticipated film of the year, Barbie. The movie, starring Margot Robbie and Ryan Gosling in lead roles, is scheduled for a worldwide release on 21 July.
However, just a few weeks before its premiere, Warner Bros' summer flick found itself in a political mess over a scene from its trailer depicting a "somewhat map" of the South China Sea with the nine-dash line, contested by the Vietnamese government.
So, where does the nine-dash line come from? What makes it so controversial? And why is it significant for Vietnam and China? Here's all you need to know:
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