What the Data for This Category Looks Like
Data sources for air pollution control financing daily reports include project announcements from local ecological environment departments, special bond filing information from the National Development and Reform Commission, and public data from third-party environmental industry research institutions. Updates occur daily. A single daily report document typically includes multiple pages of structured tables and a small amount of annotation text. Core fields include project name, administrative region, total investment amount, air pollution control type (such as VOCs control, flue gas denitrification), financing channel (bank loan, government special bond, social capital), and approval status. Investment amount is measured in ten thousand yuan. Date fields use the YYYY-MM-DD format. Some documents include a unique project code.
What Constraints Do These Characteristics Impose on Document Parsing and Chunking
The core data of air pollution control financing daily reports relies on structured tables, with a small amount of supplementary explanatory text mixed in. The parsing link must prioritize identifying table structures to avoid splitting cell content and breaking field associations. The daily update frequency means document volume is moderate but updates are frequent. Chunk length must balance information integrity and retrieval efficiency, and should not be too long or too short. Some project information spans multiple pages. Chunking must retain inter-page context to ensure complete project information is not split apart. Fields include structured data such as investment amounts with units and standardized dates. Chunking must bind corresponding attribute tags synchronously to avoid field matching confusion during retrieval.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | The core information of a single project is approximately 300–500 characters. This range can cover a single project plus associated annotations, while controlling chunk volume |
chunkOverlap | 150–200 characters | Contextual association of core fields such as project name and investment amount must be retained, to avoid key information being split across chunks |
parseTableMode | full-table-chunk | Structured tables in daily reports are the core data carrier. Fully parsing table chunks can retain field correspondence, avoiding cell splitting and misalignment |
chunkDuplicateStrategy | keep-all | Some projects will appear repeatedly in different daily reports. Retaining duplicate chunks can meet full retrieval requirements and adapt to the order requirements of custom chunking |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Large daily report documents contain multiple pages of tables and text, reserving sufficient time to avoid parsing timeout failures |
maxChunkPerDoc | Calibrated based on document volume | Adapt to the number of projects in a single daily report, avoiding excessive chunk quantity causing high index resource occupancy |
The parameter values provided on this page are conventional recommendations used as a starting point for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require case-by-case analysis. It is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Phenomenon: After customizing chunks and uploading to the knowledge base, duplicate project chunks are automatically deleted, causing the index order to not match the custom chunking logic. Cause: The
chunkDuplicateStrategyparameter was not configured correctly, and the default deduplication strategy overrides the order requirements of custom chunking. - Phenomenon: After parsing the daily report document, table fields are misaligned, and some cell content is split into different chunks. Cause: The full table chunking mode of
parseTableModewas not enabled, and the default table splitting by rows causes associated field breaks. - Phenomenon: After calling the API to create a knowledge base, real-time status of document parsing cannot be obtained, and progress can only be viewed via the interface. Cause: The corresponding parameter was not included in the API request, and parsing status information is not returned by default.
How to Confirm the Configuration Is Correct
- Upload a single test daily report document, view the parsed chunk list, and confirm that each table exists as a complete chunk with no cell splitting.
- Simulate uploading test data containing duplicate projects, check whether all custom chunks are retained in the knowledge base index, and confirm that the order matches the preset logic.
- Call the parsing status query interface, confirm that the returned status field includes three types of status values consistent with those in the interface.
- Adjust any configuration parameter, upload a test document, and compare the chunk result with the preset value to confirm that the configuration takes effect.
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.