Chinese first lady Peng Liyuan has long been a symbol of China’s fashion soft power at high-profile global summits as she accompanies President Xi Jinping. She has eschewed Western luxury labels and logos in favour of chic local brands and modern Chinese styles – a well-tailored qipao, say, or elegant scarves and coats in formal yet feminine colours. Case in point: the outfit she wore as she stepped off the plane for the much-anticipated Xi-Trump meeting in the US on Wednesday. Her grey dress,...