关税是合规的保护手段，关税水平应与产业竞争力相适应，要鼓励良性竞争，过度保护不利于产业发展和提高质量。
Tariff is a kind of protect means for compliance. The level of tariff should be compatible with industrial competitiveness to encourage healthy competition. While overprotection goes against the industry development and quality improvement.