More than a decade after tainted infant milk powder in China killed six children and exposed institutional neglect of food safety, Chinese parents still don't trust local companies to feed their babies.

That could mean another goldmine for foreign producers as the battle for infant milk shifts to the hundreds of smaller cities beyond the metropolises of Shanghai and Beijing.

The deadly milk scandal of 2008 was a watershed moment for China's consumers. Some 300,000 children were poisoned after Chinese suppliers added melamine, a chemical used to make plastic, to powdered milk to artificially boost protein levels. Tuesday marks the 10th anniversary of the sentencing to death in China of those at the center of the contamination and its concealment.