Does South Korea tax worldwide income?

Excuse me, I am a bit confused about tax regulations in South Korea. I understand that different countries have different tax systems, and I was wondering if South Korea taxes its citizens' worldwide income. For example, if I earn income from investments or business activities outside of South Korea, am I required to pay taxes on those earnings in South Korea as well? Or are only the earnings generated within South Korea taxable? I appreciate your help in clarifying this matter.