有助 (yǒu zhù) is a formal separable verb (verb-object) meaning 'to be helpful to' or 'to contribute to'. Although labeled as v.o., it rarely splits in everyday use; the most common pattern is 有助 + object (e.g., 有助健康). In formal writing it often appears as 有助于 + object, where 于 acts as a preposition. When split (e.g., 有极大的助), 助 becomes a noun meaning 'help' or 'benefit', but this split usage is limited to literary registers.