What the data for this category looks like
Data sources for residential development intelligent due diligence reports include official public platforms of land and housing authorities, internal project archives of real estate enterprises, and third-party land transaction and market databases. Update cycles vary by data type: core land and planning data is updated monthly, project construction progress data is updated synchronously with project milestones, and surrounding competitive market data is updated weekly. Documents are divided into two categories: structured ledger files, which include fields such as land area, total construction area, land acquisition time, with units such as square meters and months; and unstructured documents, including site survey records, environmental impact reports, competitive analysis documents, and similar materials, mostly in PDF or Word format.
What constraints do these characteristics impose on the model access and configuration link
Residential development due diligence data contains multi-source heterogeneous structured and unstructured content. The update frequencies of different data vary greatly, so the model access link must adapt to the processing needs of multiple data types. The units and identifiers of structured fields must be accurately matched to prevent the model from confusing project parameters of different dimensions. The differences in update cycles of multi-source data require the configuration link to support setting synchronization cycles by data type, reducing invalid calls. A single due diligence report often contains dozens of pages of content, so the system must adapt to long document parsing and context processing, avoiding parsing failures or information loss caused by improper parameter settings.
How to set the configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
maxContext | 8000–12000 characters | A single residential development due diligence report often contains dozens of pages of structured and unstructured content. This range covers full core project data and avoids context overflow |
recallTopK | Top 8–12 entries | Residential development due diligence needs to balance land parameters, progress data and surrounding market information. This recall volume covers core features across multiple dimensions |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | A single due diligence report includes many PDF-format survey and environmental impact documents, which require long parsing times. This duration supports the complete parsing process |
similarityThreshold | 0.65–0.75 | A threshold range for distinguishing core residential development project parameters from irrelevant data, suitable for similarity matching of multi-source heterogeneous data |
rerankReturnTopN | Top 5–8 entries | After re-ranking recalled multi-dimensional data, retain the most relevant core entries to meet the information screening needs of due diligence reports |
UPLOAD_FILE_MAX_SIZE | 2000 MB | A single residential development due diligence report may include multiple high-definition survey photos and complete project ledgers. This upper limit meets storage requirements |
The parameter values provided on this page are all conventional recommendations used as a starting point 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: After configuring the model channel, a "no available channel" prompt appears during invocation. Logs show the corresponding model identifier is not matched. Cause: Residential development due diligence requires access to embedding models to process multi-source heterogeneous data. If the correct model identifier is not used during channel configuration, or the channel is not bound to the corresponding group, matching failure occurs.
- Phenomenon: After configuring the re-ranking model, the re-ranking model option cannot be selected when creating an application. Cause: The channel and identifier of the re-ranking model are not correctly configured in
config.js, or the permission switch for the corresponding model is not enabled. - Phenomenon: A timeout error appears when parsing a large due diligence report. Cause: The
PARSE_FILE_TIMEOUT_SECONDSparameter is not adjusted to a duration suitable for residential development documents. The default duration is insufficient to complete parsing of multi-page PDFs and images.
How to confirm successful configuration
- Upload a single residential development due diligence report, check the parsing task status logs, and confirm there are no parsing failure-related prompts.
- Initiate a knowledge base recall test, and verify that the number of recall results matches the configured recall parameters.
- Check the model channel management page, and confirm that the channel status of the corresponding embedding and re-ranking models is available.
- Trigger a question-and-answer request for a residential development project, and verify that the returned results include information related to the project's core fields.
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.