In dance training, dancers use guide lines to help them control their body posture and dance steps, thus improving their skills and accuracy. The guide line is usually a rope or rubber band, which is fixed on the dancer's body, such as waist, arms or legs, to achieve the purpose of guiding the action.
But once the dancer has mastered the correct body posture and dance steps, the guide line will gradually decrease until it is no longer needed. This is because the beauty and skills of dance require free-flowing dance, not restricted movements. Over-reliance on guiding lines may limit dancers' freedom and expressiveness.
Therefore, choreography is usually regarded as an auxiliary tool to assist the learning and cultivation of skills, rather than a permanent equipment.