‘此类’ is a formal, written noun phrase meaning 'this kind/type' or 'this category'. It combines 此 (cǐ), meaning 'this', and 类 (lèi), meaning 'kind', 'type', or 'category'. Together, they function as a demonstrative noun modifier — always referring back to something previously mentioned or clearly implied in context. Unlike the more conversational ‘这种’, 此类 is common in academic, legal, technical, or official writing, where precision and formality are valued.

It typically appears before a noun (e.g., 此类动物, 此类产品) or stands alone as the subject or object of a sentence (e.g., ‘此类情况需特别关注’). While grammatically correct in speech, it sounds stiff or overly bureaucratic in casual conversation — native speakers usually opt for 这种 or 这样的 in everyday use. Its tone is neutral but leans formal, and it carries no emotional connotation.