[I. SINOVAC REPORTS UNAUDITED SECOND QUARTER 2009 FINANCIAL RESULTS - Conference call scheduled Wednesday, August 19, 2009 at 8:00 a.m. ET - - Reaffirmation of 2009 sales projection to be $55 million to $60 million - - H1N1 vaccine may drive additional growth - BEIJING, Aug. 19 /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE Amex: SVA), a leading developer and provider] [FORM 6-K __________ __________ SINOVAC BIOTECH LTD. 39 Shangdi Xi Road Haidian District Beijing 100085, People’s Republic of China X Form 20-F X Yes _______ No N/A 82- SINOVAC BIOTECH LTD. Form 6-K TABLE OF CONTENTS Page 3 4]

[Sinovac Reports Unaudited First Quarter 2009 Financial Results - Conference call scheduled Friday, May 15, 2009 at 9:00 a.m. ET- - Reaffirmation of 2009 sales projection to be $55 million to $60 million- BEIJING, May 15 /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE Amex: SVA), a leading developer and provider of vaccines in China has announced its unaudited financial results for] [FORM 6-K __________ __________ SINOVAC BIOTECH LTD. 39 Shangdi Xi Road Haidian District Beijing 100085, People’s Republic of China X Form 20-F X Yes _______ No N/A 82- SINOVAC BIOTECH LTD. Form 6-K TABLE OF CONTENTS Page 3 4]

[Sinovac to Present at 2009 UBS Global Life Sciences Conference BEIJING, Sept. 16 /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE: SVA), a leading provider of biopharmaceutical products in China, announced today that Mr. Weidong Yin, Chairman, President & CEO, will present at the 2009 UBS Global Life Sciences Conference in New York City. The presentation is scheduled for Tuesday, September 22,] [FORM 6-K __________ __________ SINOVAC BIOTECH LTD. 39 Shangdi Xi Road Haidian District Beijing 100085, People’s Republic of China X Form 20-F X Yes _______ No N/A 82- SINOVAC BIOTECH LTD. Form 6-K TABLE OF CONTENTS Page 3 4]

[Sinovac Obtains Lot Release Certificate for Its First Batch of H1N1 Vaccine BEIJING, Sept. 8 /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE Amex: SVA), a leading provider of vaccines in China, today announced that the first lot of PANFLU.1, its H1N1 vaccine, has passed the lot release process of China's National Institute for the Control of Pharmaceutical and Biological Products and] [FORM 6-K __________ __________ SINOVAC BIOTECH LTD. 39 Shangdi Xi Road Haidian District Beijing 100085, People’s Republic of China X Form 20-F X Yes _______ No N/A 82- SINOVAC BIOTECH LTD. Form 6-K TABLE OF CONTENTS Page 3 4]

[Sinovac Obtains Initial Order of H1N1 Vaccine from Chinese Central Government BEIJING, Sept. 4 /PRNewswire-Asia/ -- Sinovac Biotech Ltd. (NYSE: SVA), a leading provider of biopharmaceutical products in China, announced today that the Ministry of Industry and Information Technology of the People's Republic of China has issued the initial order to Sinovac to purchase H1N1 vaccine for the national stockpiling] [FORM 6-K __________ __________ SINOVAC BIOTECH LTD. 39 Shangdi Xi Road Haidian District Beijing 100085, People’s Republic of China X Form 20-F X Yes _______ No N/A 82- SINOVAC BIOTECH LTD. Form 6-K TABLE OF CONTENTS Page 3 4]