The smallest claim anyone can check.
A carbon claim is only as strong as its smallest auditable unit. Ours is one production batch: measured, bounded, attributed, committed and recomputable. It is evidence — not an offset, credit or certification.
Fail one, and it is not a unit
We do not issue a weaker version of the same product when evidence is missing. We record a refusal or a lower evidence grade.
| Property | Requirement | Failure condition |
|---|---|---|
| Metred | The footprint derives from measured quantities. | Only spend-based invoices exist for energy. |
| Bounded | Boundary and functional unit are fixed before collection. | The boundary is chosen after seeing the result. |
| Attributed | One owner, location and batch identifier. | A batch is split across sites without a rule. |
| Committed | SHA-256 chained at issuance; daily root publicly anchored. | A value is silently revised. |
| Recomputable | A third party reproduces the commitment from published fields. | Verification requires asking our server. |
The grade is arithmetic, not a commercial tier
The customer does not choose a grade. The measured share of the footprint determines it.
| Grade | Metred share | Buyer price / batch | Appropriate use |
|---|---|---|---|
| A | ≥ 70% | ¥80 | Primary scope-3 line item; supplier programmes |
| B | ≥ 45% | ¥60 | Usable with a disclosed share of secondary factors |
| C | < 45% | ¥40 | Directional; estimate share must be disclosed |
| U | Self-declared | Free | Entry record only; not verified or externally citable |
What every unit carries
A label is not paid for twice by accident
The supplier pays for measurement and site verification. The buyer pays for a comparable, usable evidence unit. Public recomputation is free.
Where a licensed partner's conclusion is needed, partner review is scoped by shipment or quarterly evidence bundle. We do not simulate hundreds of low-value legal signatures just because a site produces hundreds of batches.
| Party | Pays | For |
|---|---|---|
| Supplier | ¥28,000 first year | Site verification and statement file |
| Supplier | ¥12,000 / year | Continuing surveillance |
| Supplier | ¥40 / batch | Registry issuance |
| Buyer | ¥40–80 / batch | Grade-dependent evidence use |
| Anyone | ¥0 | Independent recomputation |
All figures are CNY, excluding VAT and out-of-region travel at cost. See the complete fee schedule.
- A batch-level product carbon evidence record
- Comparable within the same method version
- Revocable, with a visible reason
- Independently recomputable without an account
- A carbon credit, offset or traded instrument
- A certification conclusion or regulatory approval
- Comparable across different methods
- Proof that a company or product is “zero carbon”