Wearing a black turtleneck bottoming shirt under a round neck white sweater is a classic collocation method, which is very fashionable and versatile. The round neck design of the white sweater gives a refreshing and soft feeling, while the black turtleneck bottoming shirt adds a sense of layering and fashion. This kind of collocation is simple and generous, suitable for various occasions and seasons. In addition, white and black are classic matching colors, which set off each other and make the whole shape more vivid and stylish. Generally speaking, wearing a black turtleneck bottoming shirt under a round neck and white sweater is a very nice match, which can show your fashion taste and personality.