Hello guys. Am wondering how much would I roughly need to bring in cash,considering I spent there about a week, and my budget focusing on food , shopping etc. Will it be slightly cheaper as compare to sg ? Going to Beijing.
Really depends on what your intentions are.
An average meal for 2 in Beijing cost around RMB500; eg had hotpot meal recently with my wife in a neighborhood restaurant and bill came out to RMB400 plus, without alcohol. A roast duck meal from one the established joints can easily cost RMB 1K but McDonalds meals will be average RMB40-50.
For the brave & uninformed, one can always try street snacks for RMB10 from an unlicensed street vendor. My advice is to always patronize a restaurant or shopping mall food court.
Same for shopping; buy jade?

If just normal shopping for clothes at big malls then the prices are around the same or slightly more expensive than Singapore.
If you don't like to carry too much cash, can opt to use WeChat wallet if you have one.