Chinese get taste for imported foods

Nation tipped to become world's largest market, with e-commerce leading the way

At first glance Jiang Qin's small store in downtown Shanghai seems just like any other hole-in-the-wall, mom-and-pop grocery in China, if a little more cramped and messy.

But if you drop her nickname - "Avocado Lady" - you gain entry to the club of the city's savviest shoppers of imported produce.