How do they Do It?

I can't figure this out...... can you??? please send answers tomy e-mail directly, thanks!
We've started having chinese Buffets. and several are fine....... incredibly.... afordable, and include seafood: fresh shrimp/crab legs, for example......
at a similar/lower price than an entree at most places.
How can they do this, given normal overhead costs [rent/heat,taxes etc.....] even if they don't pay 'the help'..... the explanation everyone has. How do they afford the food and overhead..... and not lose money???? Love to know,
thanks, all Best,