Document Parsing and Chunking for Paper Industry Investment

What Data for This Category Looks Like

Paper industry investment research data mainly comes from China Paper Association monthly and quarterly reports, listed paper enterprises' annual and half-year reports, spot and futures price platforms for wood pulp and waste paper, environmental department emission monitoring documents, and industry-specific research reports. Data update frequencies cover daily (raw and auxiliary material prices), quarterly (industry capacity and operating rate data), and annual (enterprise operation reports). Document forms include structured capacity and unit consumption tables, long-text industry analyses, quantified indicators with units. Fields mostly involve output, operating rate, and raw material costs. Units include tons, yuan/ton, percentage, cubic meters, and others.

What Constraints Do These Characteristics Impose on the "Document Parsing and Chunking" Link

Daily updated raw and auxiliary material price documents have variable formats, and may contain real-time market pop-ups. The association between structured fields must be retained during parsing. Quarterly capacity reports often have cross-page tables. Continuous data within tables must be avoided from being split during chunking. Long-text industry analyses and quantified indicators in enterprise annual reports are mixed. Splitting must follow semantic logic, not fixed length. Some documents use mixed units such as tons and kilograms appearing together. Unit calibration must be performed during parsing, otherwise retrieval matching after chunking will have deviations. Large industry research reports with dozens of pages per file may trigger parsing timeouts. Segmented processing logic must be adapted to reduce single parsing pressure.

How to Configure

Configuration Item	Recommended Value	Rationale
`PARSE_FILE_TIMEOUT_SECONDS`	`1200 seconds`	Paper industry single files often reach dozens of pages; default timeout is insufficient for complete parsing
`UPLOAD_FILE_MAX_SIZE`	`2000 MB`	Large industry research reports and enterprise annual reports usually exceed general upload limits
`Segment Length`	`800–1200 characters`	Paper industry documents mix structured tables and long-text analysis; this range preserves semantic integrity
`chunk_overlap`	`100–150 characters`	Avoid splitting industry analyses and associated quantified indicators, improve retrieval relevance
`RECALL_TOP_K`	`Top 8 results`	Paper industry investment research needs to cover both macro industry data and detailed enterprise indicators; more recall results can cover associated information
`PARSE_PDF_USE_MARKER`	`Enabled`	Paper documents often contain complex cross-page tables; Marker can better restore document structure

The parameter values provided on this page are common recommended 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 settings.

Three Common Mistakes

Phenomenon: A 504 Gateway Timeout error is returned after calling file parsing. Cause: The PARSE_FILE_TIMEOUT_SECONDS parameter is not adjusted; the default timeout is insufficient for processing dozens of pages of paper industry research reports.
Phenomenon: Structured table fields in parsed documents are empty. Cause: PARSE_PDF_USE_MARKER is not enabled, so cross-page paper capacity tables cannot be correctly identified.
Phenomenon: Long waits with no results after integrating pdf-marker. Cause: No file parsing queue is configured; single-file parsing occupies resources, leading to timeouts for large-volume documents.

How to Verify Proper Configuration

Upload a typical paper industry quarterly report, check if the parsed text retains the complete content of cross-page tables.
Check system logs to confirm that file parsing time does not exceed the preset PARSE_FILE_TIMEOUT_SECONDS threshold.
Test retrieval after chunking: input keywords such as "wood pulp price" and "operating rate", check if the recall results cover associated quantified indicators and analysis texts.
Verify that the uploaded file volume does not exceed the UPLOAD_FILE_MAX_SIZE limit, confirm that upload and parsing can be completed normally.

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.