Complex sentence: Parallel trade activities have redistributed supplies of a lot of goods between Hong Kong and the mainland, increasing prices of the goods, for example, milk powder prices increased by 0.4--12% from 2009 to 2011.
Split into simpler sentences: Parallel trade activities have redistributed supplies on a lot of goods between Hong Kong and the mainland. It jack up prices of the goods, for example, milk powder prices increased by 0.4--12% from 2009 to 2011.