For decades, locals and tourists alike in Hong Kong have flocked to Oi Man Sang – a 70-year-old dai pai dong (street food stall) with a loyal following. Since opening in 1956, it has been recognised by food critics and chefs as the “king of wok hei” – wok hei being the Cantonese term that describes the flavour of the perfect stir-fried dish. The restaurant gained international fame after appearing