Data Characteristics of This Category
Auto parts investment research data comes from multiple sources: industry association monthly monitoring reports, automaker first-tier supplier public financial reports, customs import and export declarations, and parts manufacturers' technical white papers. Update cycles include quarterly financial report updates, monthly industry data updates, and irregular patent and qualification document updates. Document formats cover Excel reports with structured tables, mixed-text-and-image PDF industry reports, and PDF files converted from scanned paper archives. Fields include part model, material parameters, production capacity data, export destinations, and unit price ranges. Units include pieces, kilograms, RMB, ten thousand units, and others. Some technical documents include engineering drawing annotations and parameter comparison tables.
Constraints Imposed on Document Parsing and Chunking
The multi-format and multi-field characteristics of auto parts investment research data create multiple constraints for the document parsing and chunking process. PDFs converted from scanned paper archives require OCR to extract text. The OCR recognition accuracy of engineering drawing annotations directly affects the accuracy of parameter retrieval. Structured Excel reports contain multi-column associated data. Splitting table rows or columns during chunking will damage the integrity of filter conditions. The binding relationship of multi-unit fields must be retained during chunking. This avoids the problem of parameters being disconnected from units during retrieval. Frequently updated documents need to mark version information during parsing. This prevents repeated processing of the same content.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
PARSE_FILE_TIMEOUT_SECONDS | 120–180 seconds | Auto parts documents often include large technical drawings and multi-sheet Excel files. The default 60-second timeout threshold cannot complete full parsing |
maxChunkSize | 800–1200 characters | Retain complete context of technical parameters and table rows. Avoid splitting cross-page associated data |
ENABLE_OCR_PARSE | Enabled | Adapt to a large number of scanned supplier qualification documents, technical white papers and other image-format documents. Extract valid text content |
PARSE_TABLE_KEEP_STRUCTURE | Enabled | Retain row and column associations of structured tables in Excel and PDF. Avoid splitting complete row data required for filtering |
CHUNK_OVERLAP_RATE | 10–15% | Retain technical parameter descriptions across chunks. Avoid splitting continuous material and production capacity descriptions |
RECALL_CHUNK_COUNT | Top 8–12 entries | Cover multi-dimensional parameters required for investment research. Balance retrieval accuracy and result redundancy |
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 targeted analysis. It is recommended to test on your own samples before finalizing the configuration.
Three Common Misconfigurations
- Phenomenon: After uploading scanned parts technical documents, retrieval results do not extract valid parameter content. Cause: The
ENABLE_OCR_PARSEconfiguration is not enabled. Only PDF metadata is parsed, and embedded image text is not extracted. - Phenomenon: After uploading a large multi-sheet Excel supply chain report, a
504 Gateway Timeouterror is returned. Cause: ThePARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted. The default timeout threshold cannot complete parsing of large-volume documents. - Phenomenon: When retrieving parts data where "export destination is foreign" in Excel, the number of returned result entries is less than that in the source file. Cause: The
PARSE_TABLE_KEEP_STRUCTUREconfiguration is not enabled. Associated data of table rows is split during chunking, resulting in retrieval failing to match complete filter conditions.
How to Verify Proper Configuration
- Upload one scanned parts technical white paper. Check if the parsed text includes drawing annotations and parameter text to confirm OCR functionality is active.
- Upload an Excel supply chain document containing multi-column associated data. Check if parsed chunks retain the complete row and column structure of the table to confirm table parsing configuration is active.
- Upload a 100+ page industry report PDF. Wait for parsing to complete and check task status to confirm the timeout parameter adapts to document size.
- Retrieve preset filter conditions. Compare the number of returned result entries against the source file to confirm chunk association is not damaged.
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.