What Data for This Category Looks Like
Data sources include publicly disclosed airport financing filing documents from civil aviation regional administrations, airport bond issuance information from the national inter-bank lending center, and public interim announcements from airport operating entities. The update process syncs previous day’s public financing dynamics daily. Most documents use standardized CSV format. Document fields include full and short names of financing entities, financing type (bonds, financial leasing, credit lines, etc.), financing amount, financing term, release date, fund usage, and cooperating financial institutions. Amount fields use ten thousand RMB as the uniform unit.
Constraints for Knowledge Base Retrieval and Recall
Data depends on official public channels, so retrieval must prioritize matching authoritative filing information. Filtering by metadata such as release date and financing entity must be supported. Daily incremental updates require the knowledge base to support incremental synchronization. This avoids full re-imports that consume excessive resources. Multiple business fields require the vector recall step to associate corresponding metadata. This prevents retrieval results from being disconnected from business dimensions. CSV documents may have inconsistent encoding and shifted field order. Parsing must include format validation and alignment. Financing entities have both full and short names. Synonym matching must be handled during recall to ensure all valid entity references are retrieved correctly.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
UPLOAD_FILE_MAX_SIZE | 500 MB | Single CSV file for airport financing daily reports is typically manageable in size. This setting avoids large file import timeouts and covers most business scenarios |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Large batch CSV files require longer processing periods. This duration ensures complete parsing of all data and avoids mid-process interruptions |
chunkSize | 800–1200 characters | Text for individual financing daily reports has relatively complete semantic meaning. This segment length balances context integrity and retrieval accuracy, avoiding broken semantic associations from overly short segments |
recallTopK | Top 10 entries | Retrieval needs for financing daily reports typically focus on latest updates. This setting controls the volume of returned results and reduces subsequent processing load |
vectorSimilarityThreshold | 0.75–0.85 | This range balances precision and recall rate. It filters irrelevant historical financing information while covering retrieval needs for similar business scenarios |
ENABLE_INCREMENTAL_SYNC | Enabled | Airport financing daily reports have daily incremental data updates. Enabling incremental synchronization reduces resource usage from full synchronization and improves update efficiency |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material format, data volume, and business rules. Specific issues require individual analysis. It is recommended to test with your own samples before finalizing settings.
Three Common Mistakes
- Garbled Chinese fields appear after uploading a CSV file, even if character encoding is configured. The cause is failure to select the encoding format matching the source file in the file parsing configuration. Some older public documents use GBK encoding, which differs from the default UTF-8 encoding.
- After updating from version 4.9 to 4.10, original knowledge base searches return no results. The cause is that the new version’s vector retrieval engine updated the index storage format, and the original knowledge base was not regenerated with vector indexes. This prevents matching of retrieval requests.
- The error
invalid configuration parameter name "hnsw.max_scan_tuples"appears during knowledge base search. The cause is that the configuration file retains deprecated HNSW index parameters, and configuration items were not updated per the new version documentation.
How to Confirm Configuration Is Correct
- Upload a CSV of airport financing daily reports containing test data. Check that the parsed field list matches the source document, with no garbled characters or misaligned fields.
- Initiate a retrieval request specifying a specific financing entity and a release date within the last 7 days. Check that returned results include entries matching the specified conditions, confirming metadata filtering functions work.
- View system task logs to confirm that the daily incremental synchronization task runs normally, with no error or interruption records.
- Modify the
vectorSimilarityThresholdparameter to a boundary value of the range. Observe changes in the number of retrieval results, confirming that parameter adjustments affect recall outcomes.
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.