What are some blue chip companies in SG to buy?

Rather than simply go after Blue Chips companies, maybe it will be better to list out what you want to achieve before stating which company to buy? In addition, if you are new, are you able to hold out for long periods?

BN4 KEPPEL CORPORATION LIMITED
C31 CAPITALAND LIMITED
C38U CAPITAMALL TRUST
C6L SINGAPORE AIRLINES LIMITED
O39 OVERSEA CHINESE BANKING CORPORATION LIMITED
S63 SINGAPORE TECHNOLOGIES ENGINEERING LIMITED
S68 SINGAPORE EXCHANGE LIMITED
T39 SINGAPORE PRESS HOLDINGS LIMITED