What Data for This Category Looks Like
Financial report data for the chemical fiber category comes primarily from public periodic reports of listed companies on the Shanghai Stock Exchange and Shenzhen Stock Exchange, plus industry operation data released by the China Chemical Fiber Industry Association. Update schedules follow regulatory requirements and industry release cycles. Annual reports are disclosed before April 30 each year for the prior year. Quarterly reports are updated within 10 trading days after the quarter ends. Industry data is released monthly. Most documents are in PDF format, containing main text chapters and structured supplementary tables. Supplementary tables present quantitative data, including fields such as operating revenue, polymerization capacity, raw material purchase volume, product shipment volume. Corresponding units include ten thousand yuan, ten thousand tons, tons, thousand tons, and others.
What Constraints These Characteristics Impose on Knowledge Base Retrieval and Recall
Data sources are scattered, covering corporate financial reports and industry data. This requires adapting format parsing logic for two types of documents, increasing preprocessing costs before retrieval. Update frequencies cover quarterly, monthly, and annual cycles. The knowledge base must support incremental update mechanisms to avoid resource usage and delays from full refreshes. Documents include structured supplementary tables and main text, with quantitative data concentrated in supplementary tables. This requires distinguishing recall weights for different modules, prioritizing accurate fields in supplementary tables. Fields have clear unit attributes. Retrieval must match unit-related keywords to prevent invalid recall results with mismatched units.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
PARSE_FILE_TIMEOUT_SECONDS | 120 seconds | Chemical fiber financial report PDFs often contain multi-page structured supplementary tables, resulting in long parsing times. 120 seconds covers the parsing process for most standard documents. |
RECALL_TOP_N | Top 8 entries | Chemical fiber financial report data covers two types of data sources: corporate and industry. 8 entries can cover core quantitative fields and related analysis content while avoiding redundancy. |
SIMILARITY_THRESHOLD | 0.75–0.82 | Keywords in chemical fiber financial reports are mostly subdivision industry terms. A threshold that is too low will introduce irrelevant documents, while a threshold that is too high may miss valid matching content. |
UPLOAD_FILE_MAX_SIZE | 500 MB | The total size of annual financial report PDFs combined with industry data attachments usually does not exceed 500 MB. This value covers standard upload requirements. |
CHUNK_SIZE | 800–1000 characters | Structured supplementary table paragraphs in financial reports are long. This segment length preserves field relationships and avoids splitting that disrupts data integrity. |
RERANK_TOP_N | Top 3 entries | Core retrieval results need to focus on highly relevant content. Returning 3 entries after re-ranking meets the information needs of most financial report analyses. |
The parameter values provided on this page are common recommended starting points for configuration setup. Actual values are affected by material format, data volume, and business rules. Specific issues require individual analysis, and testing on local samples is recommended before finalizing settings.
Three Common Mistakes
- Phenomenon: When calling the chat API, the returned response does not include knowledge base matching results, only general large model content. Cause: The associated knowledge base ID is not specified in the API request parameters, or the retrieval switch for the knowledge base is not enabled.
- Phenomenon: An external system cannot retrieve matching data from a private knowledge base when calling the API. Cause: API access permissions for the knowledge base are not configured, or the request does not carry a valid API key and knowledge base binding identifier.
- Phenomenon: When using FastGPT 4.8.20, the knowledge base page fails to load or the chat interface crashes. Cause: This version has a known compatibility issue with knowledge base index synchronization. Upgrade to a stable version.
How to Confirm Configuration Correctness
- A single chemical fiber financial report test document is uploaded. The parsed segmented content is checked to confirm retention of quantitative fields and their corresponding units.
- A retrieval request containing subdivision industry keywords is initiated. The number of returned recall results is checked to match the configured recall count parameter.
- An API interface is called to initiate a retrieval request. The returned results are verified to include knowledge base matching source identifiers and related fragments.
- The knowledge base update management interface is viewed. The incremental update task is confirmed to have started at the set frequency.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-14.