正规 (zhèng guī) means 'regular, standard, legitimate' — it describes something that meets official or widely accepted standards, like a regular education or legitimate channel. It is more about 'conforming to a standard' than 正式 (zhèng shì 'formal, official'), which focuses on the formality of an occasion. Compared to 规范 (guī fàn 'standard, normative'), 正规 emphasizes the recognized or official nature, while 规范 focuses on the specific rules or norms.