What the data for this category looks like
Duty-free research report data primarily comes from securities firm industry research reports, public operation announcements released by domestic duty-free operators, and duty-free policy documents issued by the Ministry of Finance and General Administration of Customs. Update frequency adjusts based on industry trends: targeted interpretation reports will be published within 1 to 3 working days after a policy is released, while quarterly and annual industry summary reports follow fixed update schedules. Most documents are in PDF format, with structures including policy original text excerpts, passenger traffic volume, average transaction value, sales revenue and other data modules. Fields are clearly marked with units, and some research reports include chart data.
Constraints on Document Parsing and Chunking
The characteristics of duty-free research reports impose multiple constraints on the document parsing and chunking process. First, some documents have digital signatures. Parsing workflows must skip encrypted areas to prevent text extraction from being blocked by signature verification failures. Second, policy interpretations and data modules are interspersed throughout documents. Chunking must split content by topic instead of fixed page numbers, to avoid separating policy interpretations and their corresponding data into different chunks. Additionally, documents include long tables and numerical fields with clearly marked units. Chunking must retain the binding relationship between fields and units, while avoiding truncating the complete structure of long tables. Some research reports include embedded charts. The system must accurately associate charts with their corresponding text descriptions to ensure complete information during retrieval.
How to Set Configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
segment_length | 800–1200 characters | Duty-free research reports mostly contain long text paragraphs and data tables. This length balances the information density of individual chunks and retrieval accuracy |
custom_chunking_rules | Trigger based on "policy module", "data module", "interpretation module" | Matches the fixed structure of duty-free research reports, avoiding cross-topic chunking |
PARSE_PDF_IGNORE_SIGNATURE | Enabled | Digital signatures interfere with the text extraction process. Enabling this setting skips encrypted areas to complete full parsing |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Large annual summary research reports have more content. This setting reserves sufficient time to complete full parsing |
PARSE_PDF_KEEP_TABLE_STRUCTURE | Enabled | Duty-free research reports include multiple sets of data tables. Retaining structure prevents loss of data associations |
UPLOAD_FILE_MAX_SIZE | 500 MB | Meets the upload requirements for large annual summary research reports |
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 specific analysis. It is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Phenomenon: After uploading a PDF research report with a digital signature, the parsing result has no valid text content. Cause: The PDF signature skip configuration is not enabled. The encrypted signature area is blocked by the system, preventing complete text extraction.
- Phenomenon: After uploading a document via API and obtaining an access link, clicking the link prompts an unsupported format error. Cause: The uploaded document format is not supported by the system, or a format conversion exception occurs during parsing, causing the generated access link to fail to load content normally.
- Phenomenon: In the parsed and uploaded research report, chart data is not associated with the corresponding text block, and the large language model output does not mention chart information. Cause: The PDF chart structure extraction configuration is not enabled, causing the binding relationship between charts and text to be lost.
How to Verify Correct Configuration
- Upload a duty-free research report PDF with a digital signature, and check whether the parsing result includes complete policy text and data content.
- Call the API to upload a test document, obtain the access link, and verify that the link opens normally with no format errors.
- View the parsed chunk list, confirm that data fields and units are fully bound, and long tables are not incorrectly split.
- Trigger a knowledge base retrieval test, confirm that the retrieved chunks include associated content of corresponding policy interpretations and data modules.
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.