How to save money in Singapore tourism?

Do your homework, plan your time, choose scenic spots worth visiting, stay in cheap hotels, buy memory cards for passenger buses (or take the subway), plan your route, have lunch and dinner in air-conditioned cafes or hawker centers, and do retail shopping because many things can be bought in China, which is a waste of time. The clothes and shoes you wear must be good and durable, otherwise you may have to buy expensive ones on the spot if they are broken. First of all, change some new currency cash, because most of Singapore's consumption is still cash. It is also a waste of time to find a money changer in Singapore ... I am a Singaporean citizen, 68 years old, living in China for a long time ... Welcome to Singapore and have a good time.