What data for this category looks like
Policy and regulatory basis data for the construction machinery field mainly comes from official announcements and normative documents issued by the national Ministry of Housing and Urban-Rural Development, Ministry of Transport, Ministry of Industry and Information Technology, as well as local housing and urban-rural development and transport authorities. The update rhythm is adjusted irregularly following industry policy revisions. The document structure includes document number, issuing body, effective date, applicable construction machinery categories such as excavators, cranes, rollers, core execution clauses and violation penalty rules. Fields covered include policy number, applicable scope, execution standards, effective time. Units are typically pieces, hours, emission standard levels, and job site area tiers.
What constraints these characteristics impose on the "citation sources and traceability" link
The issuing body and document number of policy documents are core mandatory traceability fields. Precise association with corresponding fields is required during retrieval to avoid citing content without official basis. Construction machinery policies are segmented by equipment category, so knowledge base chunks must be split by applicable models. Otherwise, retrieved content may not match the query scenario. Policy updates have no fixed cycle, so a task to regularly sync official channels must be configured to ensure the timeliness of traceable content. Some policies have effective time limits, so time filtering rules must be added during retrieval to avoid citing expired clauses.
How to set up the configuration
Reference only; verify against the target FastGPT release and deployment documentation.
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | The length of individual clauses in construction machinery policy documents is concentrated, this range can fully retain the logic of a single policy clause |
| Single Search Limit | Top 6 entries | Matches the segmented category characteristics of policy documents to avoid redundant retrieval |
quoteMaxToken | 1200 token | Ensure that cited policy clauses are displayed completely without truncating core content |
detail | Enabled | Display traceability fields such as policy document number and issuing body to meet compliance traceability requirements |
responseData | Enabled | Retain complete fields of traceability data for external call verification |
| Knowledge Base Sync Cycle | Calibrated to the official announcement update rhythm | Adapt to the irregular update characteristics of construction machinery policies |
Three common mistakes
- Unable to return cited content after calling external release channels:
responseDatais not configured to enable traceability fields, or knowledge base sync is incomplete resulting in missing indexes. - Retrieved policies do not match the queried construction machinery category: Knowledge base chunks are not split by equipment type, leading to incorrect retrieval of cross-category policies.
- Generated answer is unrelated to the cited content and logs show retrieval exceptions: Question optimization configuration does not match the retrieval logic, causing the retrieval scope to deviate from the scope of policy documents.
How to confirm the configuration is complete
- Enter the FastGPT knowledge base management page, check the sync log to confirm that the most recent official policy sync task was completed without errors.
- Submit a test query, check the system log to confirm that the retrieval results include traceability fields configured via
detail, such as policy document number and issuing body. - Call the interface of the external release channel to verify that the returned content includes complete traceability information fields.
- Adjust the queried construction machinery category to confirm that retrieved policies only match the corresponding equipment type, with no cross-category redundant content.
The values provided 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.