What are the national standards for EMC compliance of concentrators?

In the Chinese market, concentrators are required or recommended to comply with a series of national EMC standards (GB/T), most of which are equivalent to or modified from IEC international standards. The main relevant national standards include: GB/T 17626.2 "Electrostatic Discharge Immunity Test" (equivalent to IEC 61000-4-2); GB/T 17626.4 "Electrical Fast Transient/Bulk Immunity Test" (equivalent to IEC 61000-4-4); GB/T 17626.5 "Surge (Impulse) Immunity Test" (equivalent to IEC 61000-4-5); GB/T 17626.6 "Immune to Conducted Disturbances Induced by Radio Frequency Fields" (equivalent to IEC 61000-4-6); and GB/T 17626.8 "Power Frequency Magnetic Field Immunity Test" (equivalent to IEC 61000-4-8). Regarding emission standards, they must meet GB/T 9254 "Limits and methods of measurement for radio interference from information technology equipment" (equivalent to CISPR 32/EN 55032). Product design must be based on these standards, and testing must be conducted in a CNAS-accredited laboratory.