What the documents look like
Certificates of origin serve import-country tariff and customs clearance, and they do not necessarily sit under a letter of credit. The declaration subject therefore carries responsibility for consistency among the certificate application, commercial invoice, packing list, and production cost records. These materials appear per shipment or in batches. In cross-border and multilingual retrieval, one consignment may carry Chinese and English product names, different invoice versions, and separate production records. Citation tracing has to point back to a specific material version, or the clearance stage cannot reproduce the basis for a judgment.
The knowledge base search node can link one or more knowledge bases that share the same vector model, and it outputs cited content as an array whose length may be zero. When nothing is retrieved, that output path still runs. Whether a retrieved result is adopted depends on the downstream answer step and human review. Retrieval itself does not constitute authorization, approval, or external submission. A similarity score and the minimum relevance setting act only on result filtering; they do not perform entity isolation or permission checks.
Constraints at the citation tracing step
Assumed drill sample: an exporter handles a certificate of origin for a batch of wooden furniture. The source sentences available for checking are three. The first comes from a commercial invoice: invoice number INV-2024-0871, dated 10 May 2024, goods are 200 wooden dining chairs, FOB amount USD 12,000. The second comes from a packing list: the same batch of 200 pieces, packed in 20 cartons, gross weight 2,400 kilograms. The third comes from production cost records: this batch of chairs uses imported oak, and the processing steps are completed domestically. A draft sentence to be judged reads: this batch of goods originates in China and can enjoy import-country tariff preference. When judging that draft sentence, the subject, goods quantity, invoice number, and date must match the source sentences above. The origin-rule conclusion and the tariff-preference conclusion are not stated in the materials, so they remain to be verified.
Configuration and implementation checks
| Configuration or check item | Assumed trial starting point for this page | Reason for the choice and comparison object |
|---|---|---|
| Linked knowledge bases | Select only the certificate-of-origin document base with the same vector model | Compare the vector model identifier against another candidate base item by item; do not link them together when the identifiers differ |
| Search mode | Hybrid retrieval | Compare against semantic retrieval and full-text retrieval; number-type questions rely more on keyword hits |
| Citation limit | Set to 3,000 tokens as the trial starting point | Compare against the displayed value to observe changes in citation count and answer coverage |
| Minimum relevance | Set to 0.4 as the trial starting point | Compare against the score distribution returned by retrieval; results below this value are filtered out |
| Question optimization | Keep off initially | Compare against enabled behavior for elapsed time and recalled content; evaluate again for short-question scenarios |
| Result reranking | Not enabled when no rerank model is configured | Compare ranking positions against retrieval results where a rerank model is configured |
Three common errors
- Confusing the token value of the citation limit with a thinking budget. The citation limit controls the length of content cited per search, while the thinking budget belongs to model thinking configuration, and the two measure different objects. Check method: read the citation limit field name and value in the configuration, compare against the thinking configuration field name, and record a misuse when the field names are treated as the same.
- Treating an empty citation array as retrieval failure. The search node output length may be zero, and an empty array still runs the output path. Check method: use a paper input of an empty array to check whether the downstream node continues to execute; when the downstream is designed to stop directly, record that design difference.
- Treating a retrieval hit as business authorization. Returned cited content only shows that similar text exists; it does not mean the origin determination has been approved or the certificate has been issued. Check method: check whether the source text behind the draft sentence states the origin conclusion and preference eligibility; when it does not, mark it as pending verification.
How to verify the setup
- Input the three source sentences above and the draft sentence, then compare whether the goods quantity, invoice number, and date in the draft sentence match the same fields in the source text. If the quantity or number differs, judge it as a contradiction; if the origin conclusion does not appear in the source text, judge it as unsupported.
- Input a retrieval request containing only an image, then compare whether the current vector model supports image input and whether an image index was generated when the knowledge base ingested the material. When both conditions are unmet, the image retrieval path does not execute, and this is recorded as insufficient conditions.
- Input an empty array as the search node citation output, then compare whether the downstream answer step continues to execute and retains the empty-citation marker. When the downstream continues and the marker is retained, the empty-result handoff condition is met; when the downstream stops, record that difference.
This page addresses only certificate-of-origin application, cross-border materials and multilingual retrieval, and citation tracing. During operational handover, the authorization status of materials, operations, and requests must be stated clearly; retrieval or a form must not be treated as authorization execution.