09:58     <04870>, <04871>, <04872> & <04873> - Announcement (1)              

    This announcement appears for information purposes only and does not      
    constitute an invitation or offer to acquire, purchase or subscribe       
    for the Warrants described below.                                         
                                                                              
    The Stock Exchange of Hong Kong Limited (the `Stock Exchange') takes      
    no responsibility for the contents of this announcement, makes no         
    representation as to its accuracy or completeness and expressly           
    disclaims any liability whatsoever for any loss howsoever arising         
    from or in reliance upon the whole or any part of the contents of         
    this announcement.                                                        
                                                                              
    200,000,000 European Style (Cash Settled) Call Warrants 2005-2006         
    relating to the existing issued ordinary H shares of RMB1.00 each         
    of                                                                        
                                                                              
    Aluminum Corporation of China Limited                                     
    (`Series A')                                                              
                                                                              
    100,000,000 European Style (Cash Settled) Call Warrants 2005-2006         
    relating to the existing issued ordinary shares of HK$0.50 each of        
    Cheung Kong (Holdings) Limited                                            
    (`Series B')                                                              
                                                                              
    100,000,000 European Style (Cash Settled) Call Warrants 2005-2006         
    relating to the existing issued ordinary shares of HK$0.25 each of        
    Hutchison Whampoa Limited                                                 
    (`Series C')                                                              
                                                                              
    50,000,000 European Style (Cash Settled) Call Warrants 2005-2006          
    relating to the existing issued ordinary shares of US$0.50 each of        
    Guoco Group Limited                                                       
    (`Series D')                                                              
                                                                              
    issued by                                                                 
    CREDIT SUISSE FIRST BOSTON                                                
    (incorporated under the laws of Switzerland)                              
                                                                              
    Sponsor/Manager                                                           
    CREDIT SUISSE FIRST BOSTON (HONG KONG) LIMITED                            
                                                                              
    Credit Suisse First Boston (the `Issuer') announces its intention to      
    issue the series of Warrants detailed below (the `Warrants'). Each        
    Warrant in respect of Series A and every ten Warrants in respect of       
    Series B, Series C and Series D relate(s) to one ordinary share of        
    the relevant par value specified below (the `Share') of the relevant      
    company specified below (each a `Company').                               
                                                                              
    Company   Warrants  Share     Issue     Expiry    Board     Exercise      
                                  Price     Date      Lots      Price         
    Aluminum  Series A  RMB1.00   HK$0.431  June 28,  2,000     HK$4.88       
    Corporati                               2006                              
    on of                                                                     
    China                                                                     
    Limited                                                                   
    Cheung    Series B  HK$0.50   HK$0.549  June 28,  10,000    HK$71.88      
    Kong                                    2006                              
    (Holdings                                                                 
    )                                                                         
    Limited                                                                   
    Hutchison Series C  HK$0.25   HK$0.518  June 28,  10,000    HK$68.28      
     Whampoa                                2006                              
    Limited                                                                   
    Guoco     Series D  US$0.50   HK$0.436  June 28,  10,000    HK$80.88      
    Group                                   2006                              
    Limited                                                                   
                                                                              
                                                                              
                                                                              
    The Warrants are European style and may only be exercised on the          
    relevant Expiry Date. The Warrants are in registered form and             
    exercisable only in the board lots specified above. Each Warrant in       
    respect of Series A, and every ten Warrants in respect of Series B,       
    Series C and Series D, entitle(s) the holder on exercise thereof to       
    receive from the Issuer a payment of an amount in Hong Kong dollars       
    calculated by the Issuer (the `Cash Settlement Amount') equal to (1)      
    the Entitlement (as defined in the terms and conditions of the            
    Warrants) (subject to adjustment) multiplied by (i) the arithmetic        
    mean of the closing price of one Share (as derived from the Daily         
    Quotation Sheet of the Stock Exchange, subject to any adjustments)        
    for each Valuation Date (being each of the five Business Days (as         
    defined in the terms and conditions of the Warrants) immediately          
    preceding the Expiry Date as more fully described in the terms and        
    conditions of the Warrants) less (ii) the relevant Exercise Price         
    (subject to adjustment); less (2) the Exercise Expenses (as defined       
    in the terms and conditions of the Warrants). For the avoidance of        
    doubt, if the Cash Settlement Amount is a negative figure, it shall       
    be deemed to be zero.                                                     
                                                                              
    If, on any Expiry Date, the Cash Settlement Amount is more than           
    zero, the Warrants will be automatically exercised (without any           
    notice being given to the holders of the Warrants) and the Issuer         
    will pay to the holders the Cash Settlement Amount calculated as          
    described above.