IRREVOCABLE PROXY

         In consideration of the terms of a Redemption  Agreement between Cheung
Laboratories,  Inc. (the "Corporation") and the undersigned, dated June 6, 1996,
the  undersigned  holder  of  20,000,000  shares  of  the  common  stock  of the
Corporation  (hereinafter referred to as the "Common Stock") hereby appoints Dr.
Augustine Y. Cheung as agent and proxy of the undersigned, and representative of
the Corporation,  with full power of substitution,  to vote all shares of Common
Stock which the undersigned  would be entitled to vote, with all power which the
undersigned  would  possess,  upon all matters that may properly come before the
shareholders of the Corporation.

         This proxy shall be  irrevocable  for the period  June 6, 1996  through
February  28,  1997 and the  undersigned  hereby  revokes  any proxy or  proxies
heretofore given to vote such shares of Common Stock.

WITNESS:                                             STOCKHOLDER:



                                                  /S/ Gao Yu Wen
                                                      Gao Yu Wen