Singapore hotel (2 nts, mid-range)~$130
Beijing hotel (3 nts)~$210
Shanghai hotel (2 nts)~$180
Chongqing hotel (2 nts)~$100
Hong Kong hotel (3 nts)~$270
SIN→PEK direct flight (all 6)~$300
Beijing→Shanghai high-speed rail~$60
Shanghai→Chongqing flight~$80
Chongqing→Hong Kong flight~$120
Macau ferry return~$35
Daily spend × 12 days (~$70/day)~$840
Great Wall tour + entries~$50
Misc / buffer~$240