The Chinese idiom "蔚为大观" is formed by combining the character 蔚, meaning "luxuriant" or "grand", with 为, meaning "to be" or "to become", to create a verbal phrase that acts upon the nominal phrase 大观, meaning "grand view" or "magnificent spectacle", resulting in a fixed expression that literally signifies "to become a grand sight" and is used to describe something impressively vast or splendid.