Rén zhǒng literally means 'human kind' or 'type of human'—rén (person/human) combined with zhǒng (kind, variety, species). In modern Chinese, it refers specifically to biological race, as understood in anthropology and biology—e.g., distinctions based on shared physical traits, ancestry, and genetic patterns. It is a formal, academic term and appears most often in scientific, historical, or sociological contexts.

Unlike the more socially constructed concept of 'ethnicity' (mínzú), rén zhǒng emphasizes biological classification, though its use is increasingly debated due to the scientific consensus that human genetic variation does not support rigid racial categories. It is rarely used in casual conversation and carries technical weight—similar to English 'race' in textbooks or research papers, not everyday speech about identity or culture.