What the data for this category looks like
Core documents covered by this category include sampling plans, sampling forms, inspection reports, non-compliant food verification and disposal reports, and risk control announcements. Data sources are the food safety sampling monitoring system, the State Administration for Market Regulation sampling results query system, laboratory LIMS, and enterprise account books. The update frequency is monthly. Documents contain fixed-format sampling information, inspection data, and policy basis fields. Individual file content lengths vary widely, with some inspection reports reaching thousands of characters.
What constraints these characteristics impose on the vector model and indexing link
The monthly update frequency requires indexes to support incremental synchronization, to avoid resource consumption from reprocessing historical data. Mixed storage of multiple document types requires chunking strategies adapted to different file content lengths, to avoid damaging the integrity of key information such as policy clauses and inspection conclusions. Multi-source data requires field standardization mapping first, to ensure documents exported from different systems can participate in vector matching uniformly. Specific fields in core documents such as inspection reports require indexes to retain corresponding identifiers, to prevent irrelevant documents from interfering with accurate retrieval.
How to set configurations
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | Adapt to the single-page content length of sampling reports and sampling forms, avoid damaging the integrity of key information during chunking |
| Overlap Length | 100–150 characters | Compensate for context breaks after long document chunking, ensure context continuity of policy clauses and inspection conclusions |
maxToken | 4096 | Adapt to the maximum token limit for policy provisions and inspection reports, comply with system model requirements |
| Similarity Threshold | 0.75–0.85 | Meet the accuracy requirements for matching policy basis, avoid interference from irrelevant sampling plans and historical reports |
| Single Search Limit | Top 10 entries | Cover the retrieval scope of commonly used policy basis and inspection standards, meet regulatory verification needs |
defaultToken | 2048 | Set the default context token length, adapt to information integration requirements for basic Q&A scenarios |
Three common mistakes
- Retrieval returns no results after custom index configuration. Cause: Failed to map key fields of core documents such as sampling plans and inspection reports to index matching fields, or the chunk length exceeds the system processing limit.
- Failed to connect a custom vector database. Cause: Failed to configure connection parameters according to the FastGPT v4.17.0 access specifications, or the data format does not match the vector dimension required by the system.
- Tencent Hunyuan vector model access error. Cause: Failed to correctly configure the model's API key and calling parameters, or the model version is incompatible with the versions supported by the system.
How to confirm the configuration is correct
- Upload a single inspection report document, trigger index construction, and check that the system returns an index status of "Completed".
- Input test questions related to policy basis, confirm that the retrieval results include matching sampling plans or inspection standard documents.
- Adjust the similarity threshold, observe that the matching accuracy of retrieval results changes as expected.
- Verify the incremental update function: upload new monthly sampling data, confirm that the index automatically synchronizes the new content.
The values provided here are common starting points, and should be evaluated against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.