A crackdown on corruption and pricing in China's fast-growing pharmaceutical market has squeezed profits and margins, raising a red flag to global Big Pharma that the days of easy growth in the country may be over. A Reuters' analysis of more than 60 listed Chinese healthcare firms shows average profit margins declined to around 10 percent last year from 15 percent in 2012. Average net profits fell 2.1 percent, down from close to 20 percent growth in previous years. class="mandelbrot_refrag"> China has been a magnet for the big global pharmaceutical companies and other healthcare firms as growth slows in Europe and the United States. It is the largest emerging drugs market and is set to be the global number two overall within three years, according to consultancy IMS Health. true While global drugmakers withhold their class="mandelbrot_refrag"> China profit figures, the analysis suggests profit growth is harder to come by - a concern a