What data for this category looks like
Residential development investment research data mainly comes from land transfer announcements issued by natural resources departments, pre-sale permission documents from housing and urban-rural development departments, project feasibility study reports, construction progress ledgers, and industry market monitoring reports. Update frequencies vary: land transfer announcements are updated quarterly, pre-sale permission data is updated weekly, construction progress ledgers are updated daily, and industry research reports are updated monthly. Document types include structured tables with quantitative indicators such as plot ratio and floor area, long-text feasibility analyses, and scattered policy notices. Field units are mostly square meters, yuan per square meter, percentage, and some documents include positioning information such as longitude and latitude coordinates of project locations.
Constraints on the document parsing and chunking stage
Structured tables in land transfer announcements and pre-sale permission documents must be fully retained. This prevents loss of association between corresponding quantitative indicators after chunking. Feasibility study reports contain dense professional terminology. Chunk lengths must balance contextual relevance and retrieval accuracy. Daily updated construction ledgers must support incremental parsing. This avoids wasting resources on full repeated processing. Multi-source heterogeneous document formats, including PDF forms, Word tables and Excel ledgers, require unified parsing logic. This prevents loss of some fields. Units for quantitative fields must be fully retained. No automatic conversion or omission is allowed. This ensures the accuracy of investment research analysis.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
PARSE_FILE_TIMEOUT_SECONDS | 300–600 seconds | Residential development feasibility study reports and construction ledgers are large documents with long parsing times. This setting avoids timeout interruptions to the parsing process |
Chunk Length | 800–1200 characters | Documents contain many professional terms and long paragraphs. This range retains contextual relevance while ensuring retrieval accuracy |
UPLOAD_FILE_MAX_SIZE | 500 MB | Single batch construction ledgers or large feasibility study reports have large sizes. This setting adapts to large file upload requirements |
PARSE_KEEP_TABLE_STRUCTURE | Enabled | Structured indicator tables in land transfer announcements and pre-sale permission documents must retain their original format. This facilitates subsequent association of investment research indicators |
INCREMENTAL_PARSE_ENABLED | Enabled | Daily updated documents such as construction progress ledgers benefit from incremental parsing. This reduces overhead from repeated processing |
LOCAL_UPLOAD_DIR | /data/fastgpt/upload/residential-dev | Uniformly categorize residential development investment research documents. This simplifies operation and permission management |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require specific analysis, and it is recommended to test on your own samples before finalizing.
Three Common Configuration Mistakes
- Phenomenon: The server returns a 404 status code after uploading a file. Parsing works normally in the local environment. Cause: The server-side path for
LOCAL_UPLOAD_DIRis not configured correctly, or the service running account does not have read/write permissions for the corresponding directory. - Phenomenon: Parsed chunks do not retain quantitative units from the original document. For example, "floor price 3000" loses the "yuan/㎡" identifier. Cause: The
PARSE_KEEP_TABLE_STRUCTUREconfiguration is not enabled, or the parsing module does not enable field metadata retention logic. - Phenomenon: Attempting to push files through an external system for parsing fails to trigger the chunking process. Cause: Parsing trigger rules for external API pushes are not configured, or the pushed file path is not mapped to a storage directory accessible by the service.
How to Verify Correct Configuration
- Upload a residential development document within the business scope. Check if the parsed result retains the original table structure and quantitative field units. Verify that the corresponding configuration items are enabled.
- Upload a document that meets the business volume upper limit. Confirm that the upload process does not trigger file size restrictions, and the parsing process does not time out.
- Modify an already parsed document and re-upload it. Confirm that only newly added or modified content is processed. Verify that the incremental parsing configuration is effective.
- Push a test file through an external system. Confirm that the parsing node automatically triggers the chunking process and generates knowledge base entries. Verify that the external push configuration is correct.
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.