firstly, we need to collect data and information about the epidemic situation, including topics, data, statistics, etc., and then select the required parts and sort them out. When drawing statistical charts, certain typesetting should be carried out according to the needs to ensure the visual beauty of the picture layout.

Then draw a statistical chart of broken lines. The steps of making a statistical chart of broken lines are as follows:

(1) Arrange data according to statistical data.

(2) Draw the horizontal axis first, then the vertical axis. Both the vertical axis and the horizontal axis should have units. According to the size of the paper, it is determined to express a certain quantity in a certain unit.

(3) According to the quantity, draw the points at proper positions in the vertical and horizontal axes, and then connect the points with line segments in sequence.