The safest workflow is to validate the unified social credit code format and check digit first, then use an official registry only if entity status needs confirmation. Chakan explains the 18-character structure locally in the browser and does not prove existence or fetch business-license records.
China entity ID / format validation / check digit
Unified social credit code format and check-digit guide
A local-first guide to the 18-character unified social credit code structure, GB 32100-2015 check digit, authority/category segments, and safe validation boundaries.
unified social credit code checkerGB 32100-2015China business registration code check digit18 character social credit code validation
Separate structural validity from entity existence
A valid check digit is useful for form validation and import cleanup, but it is not proof that the organization exists or is active in a government registry.
- Must Do: state clearly that format validity is not registry confirmation.
- Must Do: keep public result indexing limited to curated examples only.
- Should Do: link the checker to an explainer topic so search and AI systems can extract the boundary correctly.
Common lookup scenarios
Validate a code before form submission or import
Explain the authority, category, region segment, and body code
Check whether the final character matches the computed check digit
Publish a safe help page without exposing arbitrary entity identifiers
Recommended workflow
- Normalize spacing and uppercase first
- Validate the allowed character set and 18-character length
- Compute the check digit from the first 17 characters
- Treat a pass as structural validation only, then use official sources for status checks
Related tool entries
A local-first guide to the 18-character unified social credit code structure, GB 32100-2015 check digit, authority/category segments, and safe validation boundaries.
Unified social credit code checker
Validate an 18-character unified social credit code locally in the browser, explain the GB 32100-2015 check digit, and break down the registration-authority, organization-category, and region segments without calling any external registry.
LookupToolChakanRMB uppercase converter
Use this rmb uppercase converter tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanChina ID checker
Use this china id checker tool to inspect, convert, or generate a clear result directly in your browser.
LookupToolChakanFAQ
The safest workflow is to validate the unified social credit code format and check digit first, then use an official registry only if entity status needs confirmation. Chakan explains the 18-character structure locally in the browser and does not prove existence or fetch business-license records.
Does a valid code prove the organization exists?
No. It only proves the string is structurally valid under GB 32100-2015.
Does Chakan query a government or commercial registry?
No. It is a browser-local structure checker only.
Continue with these topics
Searchable topic pages that group related tools, answer specific lookup intents, and make Chakan easier for search engines and AI systems to understand.
TDEE, BMR, sleep-cycle, and daily water-intake planning
A local-first planning topic that connects TDEE, BMR, BMI, healthy-weight range, sleep-cycle timing, and daily water-intake estimates without medical claims.
Open topicStock profit, dividend yield, savings-goal, compound interest, and inflation planning
A safe formula-based topic for stock profit, dividend yield, savings-goal backsolving, monthly compounding, retirement gaps, inflation-adjusted purchasing power, ROI, CAGR, and target-price planning.
Open topicChina AI search answer-source and citation readiness checklist
A public-page readiness checklist for China AI search and answer systems: source visibility, title alignment, structured data, FAQ, internal links, keyword coverage, robots, sitemap, llms.txt, and log evidence without citation guarantees.
Open topic