Double-line forms are usually more formal than single-line forms. Tables are a common way to display information, which can clearly present data. In the design of tables, double-line tables and single-line tables are two common ways. There are two lines in a two-line table. Generally, there are thick lines in the header and footer, but there are thin lines inside the table, so the whole table looks more rigorous and regular. A single-row table has only one row, usually a thin line. The whole table looks simple and natural. Because the appearance of double-line forms is more formal and standardized, in some formal occasions, such as academic papers, business reports and so on. Two-line tables are usually used to display data to reflect a more professional image. Single-line form is more suitable for informal occasions such as daily work and resume. However, in the specific application, we need to consider the actual situation and design style, and choose the appropriate table type.