The main road represents vigorous, enthusiastic, positive, enterprising, pioneering and creative, which is a powerful masculinity; Kundao represents meekness, humility, tolerance, retreat, maintenance and maintenance, and it is a gentle and feminine force.
Trunk roads mainly affect the external world of human beings, including natural, social, political and economic fields; Kundao mainly affects people's inner world, including personal psychology, spirit and morality.