These banks seow one.
First card they want proof of at least $30k per annum.
Per month less than $2.5K still ok, as long as Per annum > $30k
(Use Form IR8A)
After the first card, you will find they suka suka send you other
credits cards.
DBS send me POSB credit cards, DBS AmExpress Gold card.
OCBC send me NTUC visa