There is a net demand for Chinese food in the area, and there will definitely be such a thing as 'too much or little' supply (though obviously each offer i.e. supply is a little different)
A single restaurant will only be able to meet so much demand, so if there's a niche in terms of region or menu, maybe there's a real opportunity.
GitHub, Uber, FB - they all have network externalizations to some extent, there definitely have economies of scale, and they are playing in a global marketplace (or at least, say 'the Western world').
So, no, it's probably not a good idea to compete directly with them.
In fact, incumbents almost always win - the idea is to do something different enough, solve a problem in a different way.
Slack did not build 'better email' they went up one level and built 'better communication'. And a whole bunch of other things of course. But 'slack e-mail' probably would not have yielded them the same result.