Complex sentence: In 2017, daigou bought up all baby formula in Brisbane and Sydney Australia causing a shortage for local mothers and sell it at inflated prices and make $100,000 per year using loophole in grey marketing importing from Australia to China.
Split into simpler sentences: In 2017, "daigou" bought up all baby formula in Brisbane and Sydney Australia causing a shortage for local mothers. The products are sold at inflated prices with "daigou" making $100,000 per year using a loophole in grey market importing from Australia to China.