N-shaped doorhead refers to the doorplate with several Chinese characters hanging on the door, which is generally used to indicate the doorplate number, shop name or other signs. N stands for house number, and the number of house numbers varies according to different commercial street regulations. For example, some commercial streets stipulate that the house number must be three digits, while others stipulate that the house number must be four digits.

N-shaped doorways are also regarded as a manifestation of urban culture. On the busy streets of the city, the N-shaped doorway is a beautiful landscape. It can not only distinguish different shops and companies, but also witness the history and culture of the city. Many doorways in the old city are particularly meaningful, such as Nanluoguxiang in Beijing and Laolong Lane in Shanghai. These are the old cities with a long history, and the doorways are full of colorful cultural elements.

With the development and progress of the times, there are more and more types of N-type doors. From the traditional wooden door head to the modern LED door head, from a single house number to a more personalized facade design, it can bring more information and feelings to consumers. In today's commercial society, N-shaped doors have become one of the important symbols of businesses, so people pay more and more attention to the design and style of doors. It has become an important task for businesses to attract customers and increase sales through the design of doors.