What the data for this category looks like
Railway operation business processing data mainly comes from official ticketing system logs, station business process manuals, parcel shipping archives, and passenger service specification documents. Daily business documents are updated weekly. Temporary convenience processes adjusted for holidays are updated daily. Documents are split into business modules such as ticketing, rescheduling, refunding, and parcel shipping. These modules include fields like business number, processing conditions, required materials, and processing time limit. Time limit fields mostly use minutes and hours as units. Material requirements use pieces and copies as units.
Constraints on Multi-turn Dialogue and Prompt Engineering
Railway business documents are mostly Word files over 10 MB. They contain nested tables and step-by-step processes, which increase document parsing time. Business fields have exclusive units. Prompts must clearly define unit recognition rules to avoid confusion between hour and minute expressions for processing time limits. Business processes are updated weekly or daily. Knowledge base synchronization must adapt to this high-frequency update rhythm. Multi-turn dialogue must retain context association to avoid repeatedly asking users about known business types.
Configuration Settings
Reference only; verify against the target FastGPT release and deployment documentation.
| Config Item | Suggested Value | Rationale |
|---|---|---|
| Chunk Length | 800–1200 characters | Adapt to the paragraph and table cell length of railway business documents, avoid cutting process steps |
| Overlap Length | 150–200 characters | Retain context association of process steps, avoid losing link information in multi-turn dialogue |
| Single Search Limit | Top 8 entries | The number of associated modules for railway business processes is limited; excessive recall will disrupt dialogue logic |
| Maximum Context | 6000–8000 characters | Adapt to the interaction history between users and the system in multi-turn dialogue, avoid exceeding model context limits |
| Question Optimization | Enabled | There are many railway business terms; optimization unifies the matching degree between user questions and knowledge base retrieval expressions |
variables Variable Configuration | Preset "business type" and "processing scenario" variables | Quickly locate the railway business module corresponding to user questions, improve retrieval efficiency |
Three Common Mistakes
- Symptom: After uploading a railway business Word document over 10 MB, the interface displays a "Document parsing timed out" error, with a duration exceeding 30 seconds. Cause: The chunk configuration was not adjusted for nested tables and long paragraphs, causing the parsing module to repeatedly cut invalid content.
- Symptom: After enabling input guidance and configuring a custom thesaurus, the debug preview pops up a "Custom thesaurus address is invalid" error, and the input guidance does not trigger normally. Cause: The custom thesaurus configuration was not bound to the knowledge base corresponding to the railway business process, or the thesaurus file format does not meet requirements.
- Symptom: In multi-turn dialogue, after the user mentions that they have already completed a refund business, the system still repeatedly asks about the refund processing conditions. Cause: Context association was not configured correctly, or the
messagesparameter did not pass complete historical interaction content.
How to Confirm Proper Configuration
- Upload a railway business process Word document containing nested tables, check whether the parsed text blocks retain complete process steps and field information.
- Initiate two consecutive business consultation dialogues, such as first asking about the refund process and then asking about the refund time limit. Confirm that the system can associate the business type of the historical question without repeated inquiries.
- Check the knowledge base synchronization log, confirm that the railway business document synchronization update is completed according to the weekly or daily update rhythm.
- Call the
chatIdrelated interface to initiate multi-turn dialogue, confirm that the historical interaction content is correctly retained and used for subsequent retrieval.
The values given 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.