What is the role of requiring FTA CO for export documents to South Korea?

What is the role of requiring FTA CO for export documents to South Korea?
FTA CO is the China-Korea Free Trade Agreement Certificate of Origin. The main functions of requiring this document for goods exported to South Korea are as follows:
Tariff reduction: When importers declare at the Korean customs, they can enjoy the tariff reduction and exemption benefits stipulated in the China-Korea Free Trade Agreement with a valid FTA CO. This can greatly reduce import costs. For example, a batch of export goods from a foreign trade company in Xinjiang obtained the first new version of the China-Korea Free Trade Agreement Certificate of Origin in Xinjiang. The company enjoyed a tariff reduction and exemption of about US$3,800, making the products more price competitive in the Korean market.
Improve market competitiveness: Due to the reduction in tariff costs, export companies can reduce product prices, thereby having more price advantages in the Korean market, which will help increase the market share of products, expand the Korean market, and compete more effectively with Korean local companies and imported products from other countries.
Easy customs clearance: The Korean Customs will facilitate the customs clearance procedures and procedures for goods holding FTA CO, which will speed up the customs clearance of goods and reduce the detention time of goods at the port. This not only reduces logistics costs, but also reduces the various operational risks that goods may face due to being stranded at ports, ensuring the stability and smooth operation of the supply chain.