Why are some people abroad sentenced to hundreds of years?

What you said about being sentenced to hundreds of years usually happens in common law countries.

The legal systems of common law countries are quite different from those of civil law countries to which China belongs. For example, in our country, a murder case, no matter how many victims there are, is a crime of intentional homicide, but in common law countries, every person killed will be convicted of homicide, and finally the criminal laws of each crime add up to hundreds of years of imprisonment.

This expression is traditional, actual or life imprisonment, and there is no substantive difference between it and the civil law system. However, some legal scholars in common law countries believe that this expression can accurately explain how big a person's crime is (the same two murderers, one sentenced to 80 years and the other to 200 years), so they support this expression very much.