Understanding the Chinese Standards System

The Four Levels of Chinese Standards

China's standards framework operates on four tiers, established by the Standardization Law of China:

Mandatory vs. Recommended: What GB, GB/T, and GB/Z Mean

The suffix after a standard prefix tells you whether compliance is legally required:

• GB (Guojia Biaozhun) — Mandatory national standard. These carry the force of law. Products that fall under a mandatory GB must comply before they can be sold in China. Examples include GB 3095 (Ambient Air Quality) and GB 2760 (Food Additives).
• GB/T (Tuijian) — Recommended national standard. The "T" stands for tuijian, meaning "recommended." Compliance is voluntary, but these are often referenced in contracts and procurement specifications. The vast majority of Chinese standards — roughly 85% — are GB/T standards.
• GB/Z (Zhidao) — Guiding technical document. Provides technical guidance rather than requirements. Used for emerging technologies or methodologies still under development.

Industry Standards: Who Issues What

When a national standard doesn't exist for a specific domain, industry bodies issue their own standards. Each industry has a unique prefix:

How to Read a Chinese Standard Number

Let's decode GB/T 19001-2016:

• GB/T — Recommended national standard
• 19001 — Sequential standard number (this one adopts ISO 9001)
• 2016 — Year of publication or revision

Some standards also include a part number: GB/T 1.1-2020 means Part 1 of the GB/T 1 series, published in 2020.

How Chinese Standards Relate to International Standards

China actively aligns its standards with international frameworks. A standard may be:

• IDT (Identical) — Direct adoption of an ISO or IEC standard, e.g., GB/T 19001-2016 is identical to ISO 9001:2015
• MOD (Modified) — Based on an international standard with technical deviations
• NEQ (Not Equivalent) — Related to an international standard but with significant differences