The golden ratio was originally a special mathematical ratio of 0.6 18. For example, a point on a straight line divides the straight line into two parts AB, and the ratio of the length of A to the length of B is 0.6 18. Then say that the ratio of A and B is the golden section ratio, and the points on the straight line are the golden section. The golden ratio can give people a great sense of beauty and is of great use in art.