Notice Of A Substantial Shareholder's Interest

Part I
1.	Date of notice to issuer	23/05/2008
2.	Name of Substantial Shareholder	UBS AG
3.	Notice Type	Notice of a New Substantial Shareholder's interest.
Part II
1.	Date of change of Interest	21/05/2008
2.	Name of Registered Holder	UBS AG
3.	Circumstance(s) giving rise to the interest or change in interest	# Others (1) INCREASE IN UNITS IN BIO-TREAT TECHNOLOGY LIMITED RECEIVED AS COLLATERAL WHICH CARRY VOTING RIGHTS, PARTIALLY OFFSET BY; (2) DECREASE IN LOAN INTERNAL
4.	Information relating to shares held in the name of the Registered Holder
	No. of Shares held before the change 43,464,323 As a percentage of issued share capital 4.88 % No. of Shares which are subject of this notice 2,851,000 As a percentage of issued share capital 0.32 % Amount of consideration (excluding brokerage and stamp duties) per share paid or received 0 No. of Shares held after the change 46,315,323 As a percentage of issued share capital 5.2 %
Part III - Not Required
Part IV
1.	Holdings of Substantial Shareholder, including direct and deemed interest :
	Direct Deemed No. of shares held before the change 4,813,640 38,650,683 As a percentage of issued share capital 0.54 % 4.34 % No. of shares held after the change 4,813,640 41,501,683 As a percentage of issued share capital 0.54 % 4.66 %