What Data Looks Like for This Category
Policy and regulatory basis documents for commodity trading mainly originate from normative documents of competent authorities including the State Council, Ministry of Commerce, and General Administration of Customs. They also include industry association standards and internal trade compliance rules of enterprises. Documents typically include fields such as document number, issuing authority, effective date, commodity HS code, applicable tax rate, and regulatory conditions. Common units are tons, kilograms, Chinese yuan, and percentage. Some cross-border trade documents involve US dollar pricing rules. National-level policies are updated irregularly. Internal enterprise rules are adjusted to align with regulatory requirements. The length of individual documents varies widely. Ranges span from a few pages of compliance guidelines to dozens of pages of tariff lists.
Constraints Imposed on Document Parsing and Chunking
Commodity trade policy documents mix structured HS code and tariff lists, unstructured compliance clauses, and announcement text. The length of individual documents also varies greatly. This mixed structure and length variation can cause automatic chunking to break the binding relationship between commodity codes and their corresponding tax rates. Fixed chunk lengths cannot accommodate the different needs of short compliance prompts and long lists. Policy updates occur irregularly. Chunking must support partial reuse to avoid re-parsing full documents with every update. This places constraints on the granularity independence and boundary rationality of chunking.
Reference only; verify against the target FastGPT release and deployment documentation.
How to Configure Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to mixed-structure policy documents. It preserves complete semantics of compliance clauses and avoids breaking the binding relationship between commodity codes and their corresponding tax rates |
chunkSplitter | By paragraph + custom delimiter | Adapts to documents with coexisting natural paragraphs and structured lists. Custom delimiters can specify field prefixes such as "Regulatory Conditions:" and "Applicable Tax Rate:" to avoid splitting related content |
UPLOAD_FILE_MAX_SIZE | 200 MB | Meets upload requirements for large-volume files containing numerous attached tables in commodity trade policy documents |
PARSE_FILE_TIMEOUT_SECONDS | 900 seconds | Prevents timeout interruptions during parsing of large-volume tariff lists and multi-attachment documents |
customPdfParse | Enabled | Extracts the correspondence between form fields and text in official PDF policy documents. It preserves the binding information between commodity codes and tax rates |
chunkSettingMode | Manual mode | Adjusts chunking rules separately for structured lists and unstructured compliance clauses. It adapts to mixed document structures |
Three Common Configuration Errors
- After uploading a Word-format tariff list larger than 10 MB, the parsing status stays at "Processing" for a long time and eventually returns a timeout error. The cause is failure to adjust the
PARSE_FILE_TIMEOUT_SECONDSparameter. The default timeout duration is insufficient to complete parsing of large-volume documents. - After importing an Excel-format trade compliance list, the automatic chunking result merges multiple lines of related content into one chunk. Or a single commodity code is split across multiple chunks. The cause is failure to configure
chunkSplitterto use custom delimiters. It also means failure to specify Excel column headers as splitting rules. The automatic splitting logic cannot identify the row boundaries of structured tables. - For policy questions about a specific HS code, the knowledge base fails to retrieve the corresponding chunk. A newly created knowledge base with the same configuration can retrieve normally. The cause is that
customPdfParsewas not enabled during the first import. This resulted in failure to correctly extract structured field metadata. The configuration was corrected when creating the subsequent knowledge base, allowing normal retrieval.
How to Verify Proper Configuration
- Upload a single typical commodity policy document. Check the parsed chunk preview, and confirm that the commodity HS code and its corresponding tax rate are in the same chunk.
- Check the
UPLOAD_FILE_MAX_SIZEparameter in the system upload settings. Confirm that its value is greater than the maximum daily document upload volume. - For imported Excel lists, manually adjust the custom delimiter for
chunkSplitter. Verify whether the chunking result splits related content by row. - Submit a test question containing a specific HS code. Confirm that the knowledge base can retrieve chunks containing that code.
The values provided are common starting points and should be measured 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.