Supermarket shoppers brawl

Australian supermarket shoppers brawl over milk formula

Tins of formula have become objects of desire among enterprising amateur salespeople keen to get into China's black market for safe baby formula. 

The melamine scandal of 2008, in which six babies died after being fed formula that contained a dangerous chemical, created lingering mistrust in Chinese baby products.

International brands can sell for twice as much as local Chinese formula. It's become a lucrative business for many living in the West, bulk-buying tins and selling them for a mark-up.