This is a very unique debit card because it is one of the few Unionpay debit cards on the market. It has all the usual perks of being a DBS debit card: it can work as your ATM card, can be used for ERP, parking, public transport.
In Singapore, it offers 5% cashback for purchases and given that most supermarkets and petrol stations accept unionpay, it is not difficult to reach the minimum $400 purchase required per month.
Meanwhile, if you travel frequently to China, you will also like the free overseas ATM cash withdrawal. Even in this age where there are many multi-currency accounts out there offering free overseas cash withdrawals, I do not know of any that allow CNY withdrawals, so this is one big plus point of the DBS Unionpay debit card.