What the Data for This Category Looks Like
Data sources for the duty-free category primarily come from the General Administration of Customs off-island duty-free merchandise filing list, official on-sale SKU documents published by off-island duty-free shops, and duty-free exclusive product materials provided by brands. The update schedule is monthly updates for on-sale SKU information, and quarterly syncs for latest off-island shopping policy adjustments. Each document includes fields such as product name, post-duty price, per-person per-purchase limit, applicable off-island ports, and effective end date. Purchase limits are measured in units. Policy adjustment fields use date formats to mark effective ranges.
Constraints Imposed by These Characteristics on Multi-turn Dialogue and Prompt Engineering
Dispersed data sources require recalling content from multiple knowledge bases simultaneously. Prompts must explicitly specify associated datasets such as off-island filing lists and duty-free shop published documents. High-frequency queries for purchase limits and applicable ports require retaining context. Multi-turn dialogue must enable context memory functionality. Policy updates occur frequently. Knowledge base effective date filtering rules must be configured to avoid returning expired policies. Individual product documents have many fields. The number of recalled entries must be limited to prevent context length from exceeding model processing limits.
Configuration Settings
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
Recall count | Top 3 entries | Individual duty-free product documents have many fields. Excessive recall will exceed the context window |
Similarity threshold | 0.75–0.85 | Distinguish precise product information from generalized policy content, and avoid recalling irrelevant entries |
maxContext | 4000–6000 characters | Adapt to the context splicing requirements of multi-field duty-free products, and avoid truncating key information |
Knowledge Base Update Time Filter | Only recall documents updated in the last 90 days | Match the high-frequency update rhythm of duty-free policies and SKUs |
Conversation Context Retention Rounds | First 5 dialogue turns | Remember the user's port and purchase limit query history to support multi-turn consultations |
PARSE_FILE_TIMEOUT_SECONDS | 120 seconds | Avoid parsing timeouts when processing bulk SKU documents |
The parameter values provided on this page are general recommendations used as a starting point for configuration. Actual values are affected by material format, data volume and business rules. Specific issues require case-by-case analysis. It is recommended to test on your own samples before finalizing settings.
Three Common Misconfigurations
- The dialogue interface returns a 404 status code (no body). This occurs when the target knowledge base to call is not explicitly specified in the prompt, or the corresponding knowledge base has not completed release configuration.
- Unable to call the specified duty-free knowledge base for search via prompt. This occurs when the unique identifier of the corresponding knowledge base is not bound in the prompt, or the dataset is not open to the current application.
- Multiple preset questions in the dialogue opening cannot be displayed normally. This occurs when the "preset opening questions" switch is not enabled, or the input questions do not follow the line break format required by the system.
How to Verify Successful Configuration
- Initiate a query about off-island duty-free merchandise. Check that the recalled results only include content from the target duty-free knowledge base, and verify the knowledge base binding configuration in the prompt.
- Initiate a multi-turn dialogue involving off-island ports and purchase limits. Check that the system retains the context of previous queries, and confirm that the dialogue context retention function is enabled.
- Initiate a policy-related query. Check that the returned results include the latest effective date information, and confirm that the knowledge base update time filtering configuration is set as required.
- View the dialogue interface return content. Check that it includes relevant fields for citing sources, and confirm that the configuration for returning cited sources is enabled.
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.