The human crest has a special physiological curvature, so the correct sitting posture needs to be consistent with this physiological curvature of the crest: 1, the correct sitting posture of the workforce: 1, the body slightly leaned back, the neck has a support to ensure that the neck to release its own pressure on top of the support, to avoid neck fatigue. 2, the arms hang naturally, relax the shoulder muscles; arm support, reduce arm fatigue due to force to maintain their position. Second, the correct driving posture.