类型 / 类别 lèixíng vs lèibié — “type / kind” vs “category / classification.” Learn the rule, then tap the right word in 20 sentences.

Points at what something is like on the inside: its nature, model, pattern or defining traits. Use it for personalities, styles, genres, models, and “problems of this kind.” e.g. 性格类型, 血型, 电影类型, 这种类型的人.

Points at a labelled slot in an organised system — the bin you sort things into. Use it for cataloguing, filing, forms, product categories, official or scientific divisions. More formal. e.g. 按类别归档, 商品类别, 收入类别.