If you just eat steamed bread, what's wrong with a ton of rice a day?

First of all, your stomach is used to three meals a day. If you only eat one meal, you will always feel hungry. When not eating, the stomach will still produce a lot of gastric acid to digest food, which is easy to get stomach trouble.

Secondly, even if you don't eat for a day, a meal can't be much more than the total amount of a day, which will lead to insufficient nutrition, especially if you only eat steamed bread. To put it bluntly, it is only to supplement calories, without fat, vitamins and minerals.