Under the principle of territorial jurisdiction, crimes committed within a country are tried under that country's laws, regardless of the offender's nationality.
属人主義 is the principle of personal jurisdiction, where a state's laws apply based on the nationality of the person, regardless of where the act occurred. 属地主義 is the territorial counterpart.
Compound of 属地 (territory, from 属 'belong' and 地 'land') and 主義 (principle, doctrine). The term is a direct translation of the Western legal concept of territorial jurisdiction.