HS Code (Harmonized System)
The Harmonized System is an international product nomenclature developed by the World Customs Organization (WCO) since 1988, used by 200+ countries for customs declaration, duty assessment, and trade statistics. The first 6 digits are globally identical. Countries extend with national digits: US uses 10-digit HTS, China uses 10-digit tariff or 13-digit CIQ, most ASEAN nations use 8-digit.