Unified Social Credit Code Guide

What the USCC was designed to solve

Before the unified system, organizations could be represented by different registration, organization, and tax identifiers. The current system provides one code for legal entities and other organizations. The official national standard record is GB 32100-2015, Coding rule of the unified social credit identifier for legal entities and other organizations. Open the national standards record.

The National Development and Reform Commission describes the code as unique nationwide, with one code assigned to one subject. It remains unchanged while that subject exists and is retained after cancellation for traceability. Read the official system explanation.

That stability is why the code should be the identity key in a supplier file. A former name and a current name can point to the same USCC. Two related companies, a parent and subsidiary, or a company and its branch do not become the same legal subject merely because they share branding or staff.

Recognize the 18-character format

A USCC contains digits and selected uppercase letters. The letters I, O, Z, S, and V are excluded. Beijing's market regulator explains both the allowed character set and the five-part structure. See the regulator's code guide.

For a working note, divide the positions like this:

1 | 1 | 6 | 9 | 1

1. Position 1: registration management department.
2. Position 2: organization or entity category.
3. Positions 3-8: administrative division of the registration authority.
4. Positions 9-17: subject identifier based on the organization code.
5. Position 18: check character used to test the string.

The first eight positions describe registration context, not the supplier's current operating address or factory location. The code remains stable when registered facts change, so do not infer that a company still operates in the place suggested by an older administrative segment.

Where buyers usually find the code

The business license is the most useful starting document because the USCC appears beside the registered Chinese name. Depending on the transaction, the same code may also appear on tax records, invoices, account-opening materials, certificates, contracts, or platform disclosures.

Under the current tax-number regime, legal entities and other organizations that have received a USCC use the 18-character code as their taxpayer identification number. Read the State Taxation Administration notice. This is why a supplier may call the same value a “tax number,” “company code,” or “license number.” Record the label used on the document, but preserve the actual 18 characters unchanged.

Older 15-character registration or tax identifiers can still appear in historical files. Do not pad or convert one by guesswork. Keep the historical number with its document date and use the current record to establish the present USCC. The article on USCC versus China tax numbers explains that transition in more detail.

Create an identifier provenance note

Copying an 18-character value into a spreadsheet is not enough. Store a short provenance note beside it:

This note exposes a common failure: the code is correct but came from a related company rather than the proposed seller. It also prevents a cleaner OCR result from silently overwriting an uncertain source image.

Handle OCR and transcription conflicts without guessing

First uppercase letters and remove obvious spaces or separators introduced by page layout. Then compare all 18 positions with the original document at full resolution. If a visible character is unclear, mark that position unresolved and request the original electronic file or another official document.

Do not replace an unclear character because it makes the checksum pass. Do not calculate a new final character and treat the repaired string as issued. A mathematically valid string can still be invented, copied from another entity, or attached to the wrong document.

When two documents disagree, keep both values and ask:

• Were the documents issued at different dates?
• Does one show a historical registration number rather than a USCC?
• Do the printed Chinese names identify separate entities?
• Was a branch, affiliate, exporter, or invoice issuer substituted for the supplier?
• Does the current registry result match either value?

The USCC is meant to reduce identity ambiguity, but only when the reviewer keeps it attached to its source and legal name.

Separate four different outcomes

Do not report every problem as “invalid USCC.” Use a precise outcome:

• Unreadable: the source does not support a reliable 18-character transcription.
• Structurally invalid: the length, character set, or checksum fails.
• No entity confirmed: the string passes format tests but no matching official record was established.
• Entity mismatch: the record belongs to a different Chinese legal name from the supplier document.
• Entity matched: the code and name match; current status and transaction checks remain outstanding.

A match proves neither current operating capacity nor payment safety. Continue to the business-license field guide for status, scope, address, and other recorded facts, then connect the entity to the contract, invoice, beneficiary, and operating claim.

Use the code as a join key, not a score

In a supplier file, use the USCC to join documents and events over time: current and former names, annual reports, registered changes, administrative records, contracts, invoices, and company reports. This makes chronology visible and reduces the chance that a similarly named company is pulled into the review.

Do not interpret the characters as a credit rating, company size, ownership quality, factory capability, or guarantee of active status. The identifier tells you which subject to investigate. The underlying record tells you what was registered or disclosed, and separate evidence tests the commercial claim.

To apply this workflow, search the complete USCC and compare the returned Chinese name before opening a company profile. For a concise definition, use the USCC glossary. For payment-stage use, continue with the guide to using a USCC validator before payment.

This article explains identifier handling. It does not authenticate a company, approve a supplier, or provide legal, tax, credit, or investment advice.