These standards will come into effect on August 1, 2021!

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Starting from August 1, the following **list of standards** will be implemented:
| No. | Standard No. | Standard Title | Replaced Standard No. | Implementation Date |
|-----|--------------|----------------|-----------------------|---------------------|
| 1 | GB/T 39875-2021 | Determination of chlordiazepoxide in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 2 | GB/T 39876-2021 | Determination of ** in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 3 | GB/T 39879-2021 | Determination of five components in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | GB/T 21432-2008 | August 1, 2021 |
| 4 | GB/T 39878-2021 | Determination of estazolam in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 5 | GB/T 39882-2021 | Determination of methylenedioxymethamphetamine in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 6 | GB/T 39881-2021 | Determination of zolpidem in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 7 | GB/T 39884-2021 | Determination of three components in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 8 | GB/T 15000.7-2021 | Guidelines for reference material work – Part 7: General requirements for the competence of reference material producers | – | August 1, 2021 |
| 9 | GB/T 39990-2021 | Technical specifications for particle and bioaerosol samplers | – | August 1, 2021 |
| 10 | GB/T 40026-2021 | Requirements for IoT capabilities featuring resource openness | – | August 1, 2021 |
| 11 | GB/T 39880-2021 | Determination of methaqualone in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 12 | GB/T 39883-2021 | Determination of ** in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 13 | GB/T 39885-2021 | Determination of triazolam in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 14 | GB/T 40058-2021 | Coding specifications for project codes of fixed-asset investment projects nationwide | – | August 1, 2021 |
| 15 | GB/T 15972.42-2021 | Specifications for optical fiber test methods – Part 42: Measurement methods and test procedures for wavelength dispersion characteristics | GB/T 15972.42-2008 | August 1, 2021 |
| 16 | GB/T 40052-2021 | Anti-corrosion plywood | – | August 1, 2021 |
| 17 | GB/T 21548-2021 | Measurement methods for high-speed directly modulated semiconductor lasers used in optical communications | GB/T 21548-2008 | August 1, 2021 |
| 18 | GB/T 40043-2021 | Specifications for information exchange between express delivery services and e-commerce | – | August 1, 2021 |
| 19 | GB/T 40044-2021 | Specifications for information exchange regarding warehousing and distribution in the express delivery manufacturing industry | – | August 1, 2021 |
| 20 | GB/T 39782-2021 | Specifications for drawing safety firing zone maps at anti-weather modification artillery operation sites | – | August 1, 2021 |
| 21 | GB/T 39874-2021 | Determination of bromazepam in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 22 | GB/T 39877-2021 | Determination of diazepam in suspected toxic substances – Gas chromatography and gas chromatography-mass spectrometry method | – | August 1, 2021 |
| 23 | GB/T 28515.2-2021 | Test methods for automatic switched optical networks (ASON) – Part 2: OTN-based ASON | – | August 1, 2021 |
| 24 | GB/T 33779.3-2021 | Guidelines for testing optical fiber characteristics – Part 3: Effective area (Aeff) | – | August 1, 2021 |
| 25 | GB/T 39785-2021 | Service robots – Mechanical safety assessment and test methods | – | August 1, 2021 |
| 26 | GB/T 39824-2021 | Determination of relative intensity of dyes in solutions | – | August 1, 2021 |
| 27 | GB 40050-2021 | General security requirements for critical network equipment | – | August 1, 2021 |