[Sinovac Reports Unaudited Fourth Quarter and Preliminary Full Year 2009 Record Financial Results - Conference call scheduled Tuesday, April 6, 2010 at 9:00 a.m. EDT - - Provides full year 2010 sales guidance of $67.1 million to $72.5 million - BEIJING, April 6 /PRNewswire-Asia/ — Sinovac Biotech Ltd. ( Nasdaq: SVA), a leading China-based vaccine manufacturer, announc ed today its] [1 -32371 SINOVAC BIOTECH LTD. No. 39 Shangdi Xi Road Haidian District Beijing 100085, People’s Republic of China Form 20-F x Form 40-F o o o SINOVAC BIOTECH LTD.]