A suit usually should meet one of the following conditions: ① Be tailored from the same color and material, such as Zhongshan suits, Western suits, denim wear, etc. ② Even if not made of the same color and material, they have a consistent style and design, and the fabric colors can echo each other to form a whole. For example, the color of the bottom garment fabric is darker than the top, and the fabric of the bottom garment is used to make accessories such as pockets and collars of the top garment, or the fabric of the top garment is used to make accessories for the bottom garment, etc. ③ Have a complete conception in the use of decorative accessories or color coordination, such as edging, inlays, text patterns, buttons, straps, etc., which are organically linked, mutually coordinated, and form a whole. Generally, tops and bottoms worn arbitrarily cannot be regarded as a suit.