Aamir Khan may have staged a soft power coup in China. His earthy, grassroots advocacy in Dangal of gender rights, set in semi-urban but aspirational India, has struck an emotional chord with a young, curious, tech-savvy generation of the “Middle Kingdom”.Netizens have already set alight Weibo — the Chinese equivalent of Twitter — with fulsome praise of Mr. Khan, and the breezy, non-condescending, but powerful messaging of his film. One viewer has praised the actor as India’s national treasure.