成型 (chéng xíng) means 'to take shape' or 'to become formed', often referring to a concrete object or structure reaching its final form (e.g., a city, a sculpture). It differs from 形成 (xíng chéng, HSK5), which is broader and used for both concrete and abstract things (e.g., ideas, habits). 造型 (zào xíng) focuses on modeling/design, while 塑造 (sù zào) emphasizes molding or creating an image/character.