What This Category of Data Looks Like
Policy and regulatory basis data for the infrastructure construction sector comes primarily from official public documents released by the Ministry of Housing and Urban-Rural Development, the Ministry of Transport, the National Development and Reform Commission, and local housing and transport authorities. Update cycles adjust based on the release of major policies or local detailed rules, with no fixed schedule. Each document follows a single policy file structure. It includes fields such as document number, issuing body, effective date, original clause text, and applicable project type. Standard formats apply: document numbers use a pattern like Jianshi [2024] X, dates use YYYY-MM-DD, and project types include categories such as municipal engineering and transport infrastructure. Single document lengths range from thousands to tens of thousands of characters.
Constraints for Source Citation and Traceability
Official documents carry authoritative weight, so traceability information must precisely match specific clauses and issuing bodies. Vague source labeling is not permitted. Long text documents are prone to fragmented chunking. Context continuity must be ensured to avoid clause breaks during citation. No fixed update cycle requires knowledge base sync to support on-demand triggering. This prevents outdated policies from being mistakenly cited. The applicable project type field requires the retrieval process to associate this field to filter non-infrastructure policies. This stops irrelevant content from appearing in returned results.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | Adapts to the long clause structure of infrastructure construction policy documents. Avoids lost context from overly long chunks or fragmented logic from overly short chunks |
| Overlap Length | 150–200 characters | Ensures adjacent chunks of policy clauses connect. Allows complete presentation of clause-related content during citation |
| Single Search Limit | Top 8 results | Controls the number of retrieval results. Avoids redundant policy documents interfering with precise matching |
quoteMaxToken | 300–500 token | Limits the length of a single cited content segment. Ensures traceability information is complete and does not exceed reply display limits |
responseData | Enabled | Ensures complete traceability metadata is included in returned results, including document number and issuing body |
| Reranking | Enabled | Prioritizes policy clauses directly related to infrastructure construction scenarios. Improves traceability accuracy |
Three Common Misconfigurations
- Phenomenon: Returned citation content only shows the file name, with no specific clause number or issuing unit listed. Cause: Metadata such as clause numbers and issuing bodies was not retained during chunking, making specific content impossible to locate during traceability.
- Phenomenon: After submitting a query about municipal engineering, returned policy citations are unrelated to infrastructure construction scenarios. Cause: The applicable project type field of policy documents was not associated, resulting in mixed policy files from other fields during retrieval.
- Phenomenon: Outdated policy content is still returned after the knowledge base has been updated. Cause: Knowledge base sync was not triggered according to the policy release cycle, or all policy documents were not covered during the sync process.
How to Confirm Configuration Is Correct
- Submit a policy query about municipal road construction. Check if the reply includes the document number, issuing unit, and specific clause location of the corresponding file.
- View the knowledge base sync log. Confirm that infrastructure construction policy documents have completed full sync according to the set update cycle.
- Adjust the
quoteMaxTokenparameter. Check if the length of cited content matches the expected setting. - Retrieve a policy document containing multiple clauses. Confirm that returned citation content can accurately associate with the corresponding chunked content.
The values listed are common starting points and should be measured against the reader's own samples.
Question material comes from public community discussions. Configuration values are common starting points and should be measured against your own samples. Verified on 2026-09-28.