Will it be good to stir-fry spaghetti in Shanghai?
I think business must be bad. Italians who eat spaghetti are basically rich and won't patronize your stall, while many China people who eat spaghetti go for the decoration and indoor atmosphere. Stalls are places where middle and lower classes spend money, usually ordinary people, so I feel as if business is unlikely to be good. Just a suggestion, I hope it will be useful to you.