The format of inserting tables for academic papers is to use three-line tables (without vertical lines), five-character and Song-style Chinese characters. Three-line tables usually have only three rows, namely, top row, bottom row and column row. The upper and lower lines are thick lines and the column lines are thin lines. Of course, a three-line meter doesn't necessarily have only three lines, and auxiliary lines can be added when necessary, but no matter how many auxiliary lines are added, it is still called a three-line meter.