Shanghai might be inside China – but the modern, affluent, westernised city with its glitzy architecture, expensive cars and countless luxury retailers is not the real China. China is a tale of two economies: the fast, flashy city, and the hinterland where the majority of people remain relatively poor and eke out an existence waiting for their inevitable migration to the cities. Which explains why you can walk around a gleaming new mall packed with expensive brands like Burberry, Louis Vui…