Is there any harm to the human body when one eats overnight rice quite often?

Im Cantonese, and I've been eating rice for as long as I can remember. I cant say professionally that it does or does not, but Im 99% sure that it does not endanger your health.

It depends, if you eat rice only then yes, you will become malnourished, if you eat too much rice at each meal, you could become fat, thus causing other propblems. Everything in moderaton is the key. There is a lot of nutrition in rice, but it is not a complete meal, add some protein to it, like beans, meat, or eggs.