CIRCULAR TO SHAREHOLDERS IN RELATION TO THE PROPOSED BONUS ISSUE OF UP TO 136,543,588 NEW ORDINARY SHARES IN SDSG ("SDSG SHARE(S)" OR SHARE(S)") ("BONUS SHARE(S)") ON THE BASIS OF 1 BONUS SHARE FOR EVERY 3 EXISTING SDSG SHARES HELD BY THE SHAREHOLDERS OF SDSG WHOSE NAMES APPEAR IN THE COMPANY'S RECORD OF DEPOSITORS ON AN ENTITLEMENT DATE TO BE DETERMINED AND ANNOUNCED LATER