Chinese Company Registration Numbers
Identify the correct number on Chinese supplier documents, connect historical registration numbers with a current USCC and resolve forms that reject the code.
Start with the Chinese legal name or USCC. Confirm the matching company before opening its profile.
A form asks for your Chinese supplier's company registration number. The business license contains an 18-character code, an older contract has a 15-digit number, and the invoice has another number across its top. Start with the label beside each value. These numbers identify different things, even when a supplier calls all of them its “registration number.”
For a current Mainland company business license, the Unified Social Credit Code, or USCC, is the main company identifier. An old business registration number needs a historical connection to that current record. An invoice number or certificate reference identifies a document; it should not replace the company identifier in your supplier file.
This guide helps buyers choose the right number, connect older paperwork and resolve a form that rejects the value. It concerns identifying an existing Mainland business, rather than registering a new company.
Read the label first
Find the complete document and the company name before copying a number. A cropped corner can remove the label that distinguishes an invoice reference from the seller's taxpayer identifier. When the file is a photograph, check the original at readable size rather than relying on text extracted from an email preview.
| Chinese label | Meaning | What the number identifies |
|---|---|---|
| 统一社会信用代码 | Unified Social Credit Code | The registered organization; use the complete 18-character value for a current company lookup. |
| 注册号 | Registration number | On an older business license, this may be the former 15-digit business registration number. |
| 纳税人识别号 | Taxpayer identification number | The taxpayer on the specified buyer or seller side of an invoice or tax document. |
| 发票号码 | Invoice number | A particular invoice, rather than the company that issued it. |
| 证书编号 | Certificate number | A particular certificate; identify its issuer and certificate type before using it. |
The Chinese labels are retained because they are what you will see on the source documents. English translations can vary between platforms. Business license number, company ID and registration code may refer to the USCC, but the document and the receiving form must establish that connection.
The current company identifier
The USCC appears on a modern business license beside the company's registered details. China's USCC management measures, effective from February 2026, describe it as a nationwide unique, lifelong identifier. The measures require one code for one organization and its display on the business license.
For supplier identification, copy all 18 characters and retain the exact Chinese legal name with them. Do not remove a letter because a form calls the field a “number.” Do not use only the final characters or turn the value into a spreadsheet calculation. The code is an identifier to preserve, not an amount to format.
A company's name, address and other particulars can change while the identifying code remains attached to that organization. This helps connect dated documents, but it does not make all entities in a business group interchangeable. A parent, subsidiary and other registered participant need their own identification where they appear in the order.
A USCC format and checksum check can identify certain copying errors. A passing result is not evidence that the seller on your quotation owns that code. The next step is a company lookup and a comparison of the returned Chinese name with the source document.
The older registration number
Before the unified-code reform, a company's documents could contain separate business-registration, organization and tax identifiers. The 2015 business-license printing notice records the change from a 15-digit registration-number field to an 18-character USCC field on the company licenses it covered. It also changed the printed Chinese label.
This is why an archived license can look unlike the current copy without being fabricated. The useful question is which document was issued when, and whether its company can be connected to the current registration. An old number is a historical reference; simply finding it in an old contract does not establish today's status.
The former registration number is not a shortened USCC. The State Council's unified-code scheme describes the old business registration number as a registration-authority component, a sequence and a check digit. It separately describes the organization-code component used in the modern system. Those are different structures.
Do not add a prefix to the old registration number, keep its last nine digits or calculate a new final character to “convert” it. Request the current license or find a record that explicitly connects the historical company details with its current identifier. A number created by a formula is not evidence of what the registration authority issued.
Two different 15-digit fields
Length alone is especially misleading in historical files. The same State Council scheme describes a former taxpayer number built from an administrative-division component and an organization code. It also describes the 15-digit business registration number. Both can contain 15 digits while identifying the company through different administrative systems.
Read the document heading as well as the field label. A number on an old tax registration certificate should be stored as an old taxpayer number. A number beside 注册号 on an old business license should retain its registration-number description. Calling both “old company code” throws away the distinction needed to reconcile them.
For a current ordinary company, the USCC can also appear in the taxpayer-number field. That shared value does not turn every historical tax number into a business registration number. The separate USCC and tax-number guide explains the tax-document relationship; the organization-code guide covers a nine-character legacy code.
Connect old and current records
Consider a hypothetical purchasing team reopening a supplier file. Its older agreement shows a registration number, while a new license shows a USCC and a slightly different Chinese company name. The team should preserve both documents and compare the names, dates, address and any relevant name-change record. It should not overwrite the older agreement's identifier.
- Describe the old evidence. Save its exact number, Chinese label, company name and document date. Record an unreadable character as unresolved rather than choosing a convenient digit.
- Obtain the current identity. Request the current license and the Chinese name and USCC as text. Check that the text agrees with the image.
- Look up the company. Search the complete name or USCC and compare the returned entity. Some official interfaces accept a registration number; use that option only when the interface expressly provides it.
- Establish the connection. Use the relevant registration or name-change information to explain how the old file relates to the current company. If the available information does not connect them, request the specific supporting record.
Several matching details can help locate the right record, but shared premises or staff do not prove legal continuity. If the supplier explains that a new company now handles orders, identify that new company separately. The question then concerns a changed contracting party, not merely a replacement number on the same license.
Where an authority-issued result or a filed document is needed, the registration-files guide explains the available routes and access requirements. An ordinary company search and access to underlying registration documents are different services.
A number across three documents
Imagine receiving a current license, a VAT invoice and a product certificate for one proposed supplier. The license displays the company name with its USCC. On the invoice, the same value appears in the seller's taxpayer field, while a different number identifies the invoice. The product certificate contains yet another reference for the certificate itself. This is an illustrative document comparison, not a real supplier case.
The correct comparison does not require all three documents to display the same largest number. Match the company identifiers where they are provided, then examine the legal names and roles. A product certificate may identify a manufacturer, an applicant or another holder. Its certificate number belongs in the certificate check; it does not establish which company will contract with you.
If the invoice's seller identifier leads to a second company, stop describing that as a number-format issue. Verify both entities and ask which one issued the invoice and why. If the invoice number differs but the seller's identity agrees, the difference is expected: separate invoices need their own document references.
This distinction also helps when requesting a correction. Ask the supplier to confirm the seller's taxpayer identifier, the certificate holder or the current USCC by name. “Please correct the company number” is ambiguous when the file contains several legitimate identifiers. A precise request saves the supplier from replacing the wrong field and leaves a clearer explanation for the person approving the record.
Rejected form entries
A rejected entry does not necessarily mean the company's number is invalid. Check the selected country, entity type and requested identifier. A field configured for a different jurisdiction or an older document type may not accept the full modern value. Preserve the original number while resolving the form's requirement.
Actual service rules can depend on entity type. For example, WeChat Pay's published subject-information instructions distinguish the accepted license-number formats for enterprises and individual businesses. That is a practical reason to read the recipient's instructions, not a rule for every overseas supplier portal.
If a form only permits digits, do not delete letters. If it accepts fewer characters, do not truncate the code. Ask the recipient which field should hold the complete Mainland company identifier and whether an attachment or supporting explanation is required. Keep the answer with the submission so a colleague does not repeat an improvised workaround.
A useful clarification is: “Our supplier's current Chinese business license shows an 18-character Unified Social Credit Code. Please confirm where the complete value should be entered and whether you also require a historical registration number.” This describes the mismatch without asserting that the receiving system must accept a particular document.
Check the company behind it
Once the identifier is clear, use ChinaValidate company search to identify the Mainland company and review the information available for it. If the only source is a license image, the business-license check can help extract and compare its available fields. Inspect the extraction before relying on any reported difference.
On a tax invoice, compare the seller's name and taxpayer identifier with the supplier you are checking. The buyer's identifier belongs to a different role, while the invoice number belongs to the document itself. An invoice check and a company lookup can support each other, but entering the invoice number into company search does not perform either task correctly.
Keep one current company identity in the supplier record: the verified Chinese legal name and complete USCC, with the lookup date. Preserve older registration and tax numbers in clearly labeled historical fields. That arrangement lets a reviewer recognize earlier contracts without letting an obsolete number, a certificate reference or a new affiliate silently become the identity used for the next order.