Privacy & Data Policy
This sub-site explains how charcoal quality is measured. It publishes methodology — not results.
Last updated: 2026-10-07
1. Methodology only
Test pages describe what each parameter measures and how it is generally measured under public standards. They contain no supplier-specific results and no numeric values presented as our own data. Industry reference points are labelled as class-level context compiled from public sources.
2. Test reports
The reports database is published only with genuine, attributable reports — named laboratory, report number, test date, standard and document reference. No synthetic entries, no placeholder results, no unattributed figures.
3. What we do not collect
No analytics, no tracking cookies, no advertising pixels. The hosting platform may keep standard security logs under its own policy.
4. Inquiries
This sub-site has no forms. Network-wide terms: main site privacy policy and terms of use. Contact: sales@guotan.com.