What the data for this category looks like
Duty-free investment research data comes from four sources: General Administration of Customs offshore duty-free supervision data, Ministry of Finance duty-free policy announcements, offshore duty-free store monthly operating reports, and securities firm industry research reports.
There is no fixed cycle for data updates. Policy announcements update alongside policy releases. Operating reports update on a monthly or quarterly basis. Research reports are released irregularly alongside industry trends.
Document structures fall into three categories: long-text policy files, multi-column operating data tables, and research report documents mixing text and charts.
Core fields include offshore duty-free sales, customer unit price, passenger flow, offshore passenger count, and duty-free shopping limit. Their respective units are ten thousand yuan, yuan, person-times, person-times, and yuan.
What Constraints These Characteristics Impose on the Document Parsing and Chunking Link
Mixed multi-source data formats require the parsing link to support multiple file types: PDF, Word, Excel, and scanned documents.
The combined structure of long-text policy files and multi-column operating tables requires that parsing does not incorrectly split policy clauses. It also requires accurate identification of field associations across column tables.
Irregular and batch update requirements require the parsing link to support batch upload and fast processing. This avoids overall task interruptions caused by single-file timeouts.
The existence of industry-specific fields requires that chunking retains semantic binding between fields and context. This prevents incomplete restoration of complete business logic after splitting.
How to Configure Parameters
| Config Item | Recommended Value | Rationale |
|---|---|---|
CHUNK_SIZE | 800–1200 characters | Adapts to the semantic block length of duty-free policy documents and industry research reports, avoiding splitting complete policy clauses or core research report viewpoints |
PARSE_TABLE_MULTICOLUMN | Enabled | Duty-free operating documents often contain cross-column store operating data. Enabling this option correctly identifies multi-column table structures |
PARSE_FILE_TIMEOUT_SECONDS | 300 seconds | Adapts to the parsing time requirements of large batch monthly operating reports and multi-chapter policy PDFs |
ENABLE_CHUNK_OVERLAP | Enabled | Retains policy-related content across segments and research report context associations, preventing semantic breaks |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Supports batch upload of full-store operating data file packages for monthly or quarterly reports |
PARSE_EXCEL_SHEET_MODE | Parse all sheets | Duty-free Excel reports are usually stored by store or month in separate sheets, requiring complete parsing of all data |
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 individual analysis, and it is recommended to test on your own samples before finalizing settings.
Three Common Mistakes
- Phenomenon: Multi-column operating tables show column misalignment and field confusion after parsing. The exported table structure does not match the original document. Cause: The
PARSE_TABLE_MULTICOLUMNconfiguration is not enabled, so the system cannot correctly identify cross-column store data tables in duty-free documents. - Phenomenon: Parsing times out after uploading a large policy PDF. The task status shows the
504 Gateway Timeouterror code. Cause: ThePARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted. The default timeout duration is insufficient to complete long document parsing. - Phenomenon: Parsed document segments lose associations between policy clauses. Knowledge base responses cannot coherently explain pre- and post-documents for duty-free quota adjustments. Cause: The
ENABLE_CHUNK_OVERLAPconfiguration is not enabled. No overlap between segments causes semantic breaks.
How to Confirm the Configuration Is Correct
- Upload a duty-free Excel document containing multi-column operating tables. Check if the parsed table structure matches the original document to confirm the
PARSE_TABLE_MULTICOLUMNconfiguration is active. - Upload a policy PDF exceeding the default size. Check if the task completes normally to confirm the
UPLOAD_FILE_MAX_SIZEparameter configuration meets current file requirements. - Select a policy document segment containing associated content. Check if chunking results retain overlapping parts of adjacent paragraphs to confirm the
ENABLE_CHUNK_OVERLAPconfiguration is enabled. - Parse a policy PDF containing images. Check if OCR text from the images is included in parsing results to confirm the image-related configuration is enabled.
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.