What kind of bank card should I apply for when traveling to Singapore, and I can withdraw cash directly by swiping my card?

You can use Visa master's card.

then

It is not recommended that you withdraw cash.

If withdrawing cash by credit card is equivalent to a loan, you need to pay a high handling fee and interest, and of course, the difference you lose when you exchange money.

If you want to withdraw cash, you can use UnionPay card. Of course, payment fees and currency exchange losses are inevitable.