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EXHIBIT 32.1
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This is an Exhibit to the Form 20-F of Sinovac Biotech Ltd.
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Attached find the following materials:
Certification of Weidong Yin pursuant to Section 906
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of the Sarbanes-Oxley Act of 2002
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CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
In connection with the Annual Report on Form 20-F/A-2 for fiscal year ended
December 31, 2004 of Sinovac Biotech Ltd., a company organized under the laws
of Antigua and Barbuda (the "Company"), as filed with the Securities and
Exchange Commission on the date hereof (the "Annual Report"), I, Weidong Yin,
President and Chief Executive Officer of the Company certify, pursuant to 18
U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:
1. The Annual Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934, as amended; and
2. The information contained in the Annual Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.
Dated: September 21, 2005 /s/ Weidong Yin
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Weidong Yin, President, CEO and
Director
End of Exhibit 32.1
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