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Beijing Bio-Bridge Science Corporation           Exclusive Sub-License Agreement
Bio-Bridge Science Corporation                                       Page 1 of 3
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                         EXCLUSIVE SUB-LICENSE AGREEMENT

WHEREAS Liang Qiao and Wei Shi, of 6526 Maxwell Drive, Woodridge, Illinois 60517
and 3436 South Union Avenue, #1F, Chicago,  Illinois 60616,  respectively,  have
invented  certain  technology  pertaining to  PAPILLOMAVIRUS  PSEUDOVIRIONS AS A
GENETIC VECTOR AND VACCINE ("the Technology"),

WHEREAS Liang Qiao and Wei Shi have  assigned the entirety of their  interest to
the  Technology in all  countries to Loyola  University  Chicago,  of 2160 South
First Avenue, Maywood, Illinois 60153 (hereinafter referred to as "Loyola"),

WHEREAS Loyola has signed an exclusive license agreement with Bio-Bridge Science
Corporation  of Scotia  Center,  4th Floor,  P.O. Box 2804,  George Town,  Grand
Caymen,  Caymen Islands  (hereinafter  referred to as  "Bio-Bridge")  to use the
Technology in areas specified in the agreement.

WHEREAS  Bio-Bridge  herein  sub-licensed  the  Technology at no charge (with no
royalities)  to its  subsidiary,  Beijing  Bio-Beijing  Science  Corporation  of
Beijing,  Tianzhu  Export  Processing  Zone,  the  People's  Republic  of  China
(hereinafter  referred to as "Beijing Bio-Bridge ") to use the Technology within
China( Mainland China);

NOW THEREFORE, for good and valuable mutual consideration,  the receipt of which
Bio-Bridge and Beijing  Bio-Bridge hereby  acknowledge,  the following is hereby
agreed between Loyola and Bio-Bridge:

1.   Bio-Bridge  sub-licenses to Beijing  Bio-Bridge an exclusive license to the
     Technology  within  China ( Mainland  China),  which  license  includes the
     following:

     A.   Beijing  Bio-Bridge shall have the exclusive right to make, have made,
          use, sell, and offer to sell the Technology within Mainland China.

     B.   Beijing  Bio-Bridge  shall  have the  exclusive  right to file  patent
          applications for any aspect of the Technology, at Beijing Bio-Bridge's
          expense  but in the name of Dr.  Liang  Qiao and Dr.  Wei Shi,  within
          Mainland China.

     C.   Beijing  Bio-Bridge shall enjoy, as exclusive  licensee,  the full and
          exclusive  right to any patent that might  issue in Mainland  China on
          any patent application concerning the Technology, but any such patents
          shall be owned by Loyola.  Beijing Bio-Bridge shall be responsible for
          all expenses associated with maintaining any such patents in force.

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Beijing Bio-Bridge Science Corporation           Exclusive Sub-License Agreement
Bio-Bridge Science Corporation                                       Page 2 of 3
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     D.   Beijing   Bio-Bridge  shall  have  the  right  to  grant  nonexclusive
          sublicenses  to use the  technology to its customers  within  Mainland
          China on any such terms as Beijing Bio-Bridge desires.

     E.   Beijing   Bio-Bridge  shall  have  the  right  to  grant  nonexclusive
          sublicenses  to make any  aspect of the  Technology  to its  suppliers
          within Mainland China on any such terms as Beijing Bio-Bridge desires.

     F.   Beijing  Bio-Bridge  shall have the right to enforce its rights to the
          Technology in any way it deems appropriate,  including filing suit for
          infringement  of any patent granted  thereon,  within  Mainland China,
          provided that any enforcement shall be at Beijing Bio-Bridge's expense
          and provided that Beijing  Bio-Bridge notify Bio-Bridge within fifteen
          (15) days of any act taken to enforce its rights in Mainland China.

2.   Beijing  Bio-Bridge shall notify Bio-Bridge within fifteen (15) days of any
     patent  applications  it might  file,  as well as of all events  during the
     prosecution of such patents,  including the issuance of any patents granted
     on such application.

3.   Beijing  Bio-Bridge  shall use the Technology at no charge ( no royal fees)
     within the agreement effective period.

4.   Beijing  Bio-Bridge shall make quarterly  reports to Bio-Bridge  indicating
     all uses (including the uses of any of Beijing  Bio-Bridge  sublicenses and
     all fees Beijing  Bio-Bridge  receives from the granting of any sublicenses
     of the  Technology  within  Mainland  China),  including a statement of the
     after-tax  profit  realized  from each such use. Such  statements  shall be
     supplied to Bio-Bridge within 30 days of January 1 of each year.

5.   This Agreement will continue to exist for ten ( 10 years) unless terminated
     by the force of laws,  and it shall  inure to the  benefit  of and bind all
     successors-in-interest of the parties hereto.

6.   This Agreement shall not be modified except by written instrument  executed
     by both Bio-Bridge and Beijing Bio-Bridge.

7.   Upon  termination of this  Agreement,  all  sublicenses  granted by Beijing
     Bio-Bridge Science  Corporation within Mainland China shall terminate,  and
     Bio-Bridge  shall not be liable in any way to  Beijing  Bio-Bridge  Science
     Corporation due to termination of any such sublicense.


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Beijing Bio-Bridge Science Corporation           Exclusive Sub-License Agreement
Bio-Bridge Science Corporation                                       Page 3 of 3
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8.   Upon termination of this Agreement,  Beijing  Bio-Bridge shall  immediately
     supply to Loyola a report such as  specified  in paragraph 6 for the period
     from January 1 through the date of termination.

9.   Any excuse or  variance of  performance  on the part of any party shall not
     act as a modification of this Agreement or in any way diminish the right of
     each  party  to  demand  the  other  party's  full  performance  under  the
     Agreement.

10.  This  Agreement  shall be  interpreted  in  accordance  with the law of the
     Caymen  Islands,  and it shall  be  enforceable  in the  courts  of  Caymen
     Islands.  Neither party shall object to submitting to the  jurisdiction  of
     the courts of Caymen  Islands with  respect to any matter  relating to this
     Agreement.

11.  The terms set forth in this  instrument  constitute  the  entire  Agreement
     between the parties with respect to the Technology, and it is the intent of
     the  parties  to  substitute  the  terms  set  forth  herein  for any prior
     understanding  pertaining to the Technology  that may have existed  between
     them at any time,  and the effect of this  Agreement is to  extinguish  any
     such  understanding that contradicts or in any way goes beyond the terms of
     the Agreement as set forth herein.

12.  Should any  portion  of this  Agreement  be deemed by a court of  competent
     jurisdiction  to be  unenforceable  for any reason,  the  remainder  of the
     Agreement shall remain in force.

IN WITNESS WHEREOF, the parties hereby signify their assent to the terms of this
Agreement by the  signatures  of their  representatives,  each of whom is hereby
acknowledged  to have  authority to enter into  contracts and otherwise bind his
respective party:

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For Bio-Bridge Science Corporation    For Beijing Bio-Bridge Science Corporation

Date: 2002.6.17                       Date: 2002.6.20

/s/ Yu Mingjin                        /s/ Qiao Wenhui
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President                             President
Bio-Bridge Science Corporation        Beijing Bio-Bridge Science Corporation
Scotia  Center,  4th Floor,           Beijing, PRC
P.O.  Box 2804,  George
Town, Grand Caymen, Caymen Islands
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