March 8, 2011 -- Guangdong Dahuanong Animal Health Products Co. (DHN), a veterinary products company with a bird flu vaccine, completed its IPO on the ChiNext exchange. DHN placed 67 million shares at a price of 22 RMB, raised 1.5 billion RMB ($228.4 million). The pricing reflected a price/earnings ratio of 51. The company's shares rose a modest 2% in the aftermarket to close at 22.41 RMB per share.