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Standards GB are Chinese national standards, which are issued by China's Standardization Administration Office (SAC).
Chinese national standards are used all over China commonly labeled as GB standards. They determine the united production requirements regarding product safety and quality .
GB standards are often modified or created according to the international standards of ISO, IEC or any other international level.
Although, they are largely harmonized, GB standards may differ from international standards .
Approximately 15% of all GB standards are obligatory and they can be identified according to the prefix GB, after which the code of the standards follows:
GB – Obligatory national standards
GB/T – Optional national standards
GB/Z – National steering technical document
Performance requirements of audiovisual terminals--Frame structure for a 64 to 1920kbit/s channel in audiovisual teleservices
Standard published on 13.12.1995
Selected format:Performance requirements of audiovisual terminals--Frame-synchronous control and indication signals for audiovisual systems
Standard published on 13.12.1995
Selected format:Performance requirements of audiovisual terminals--System for establishing communication between audiovisual terminals using digital channels up to 2Mbit/s
Standard published on 13.12.1995
Selected format:Performance requirements of audiovisual terminals--Narrow-band audio visual system and terminal equipment
Standard published on 17.1.2003
Selected format:Performance requirements of audiovisual terminals--Video code for audiovisual services at P×64kbit/s
Standard published on 13.12.1995
Selected format:The door gasket for freight container
Standard published on 14.12.2006
Selected format:Dosimetry for nuclear criticality accidents
Standard published on 31.10.2025
Selected format:Regulations for radiation and environment protection in uranium exploration
Standard published on 6.5.2009
Selected format:Leakage test methods for sealed sources
Standard published on 30.5.2025
Selected format:Information technology—Security techniques—Digital signature schemes giving message recovery—Part 3Discrete logarithm based mechanisms
Standard published on 28.12.2018
Selected format:Latest update: 2026-06-09 (Number of items: 2 281 484)
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