What the data for this category looks like
Data for duty-free intelligent due diligence reports comes primarily from three sources: the Customs General Administration’s off-island duty-free supervision system, the Ministry of Finance’s duty-free policy announcement database, and the operation filing interfaces of off-island duty-free shops. Update cycles vary: off-island shop filing information updates in real time, duty-free purchase limits are adjusted quarterly, and policy announcements are released irregularly.
The data structure includes these fields: 10-digit duty-free product category code, off-island shop filing number, annual duty-free quota, single-item purchase limit, and filing validity period. Their respective units are: none, none, yuan, pieces, and YYYY-MM-DD format. All fields include exclusive duty-free supervision identifiers to distinguish them from regular commercial goods data.
What constraints do these characteristics impose on HTTP interfaces and external systems?
Multi-data source integration is a clear requirement. Three interfaces (Customs, Ministry of Finance, and store systems) must be connected at the same time. Unified mapping and format alignment for cross-source fields are needed.
Update cycles range from real time to quarterly. Differentiated polling and caching strategies must be adapted to avoid data lag or redundant calls. Duty-free category codes and filing numbers follow fixed regulatory formats. Interfaces must add exclusive validation logic to prevent invalid data from entering due diligence reports.
Customs interfaces typically have strict call frequency limits. Concurrent request volume must be controlled to avoid triggering rate limiting rules.
How to set configurations
| Configuration Item | Recommended Setting | Rationale |
|---|---|---|
external_api_timeout | 300 seconds | Duty-free data requires splicing content returned by multiple source interfaces. Single requests take a long time, and the default timeout duration is insufficient |
request_retry_count | 3 retries | Customs supervision interfaces have temporary fluctuations. Multiple retries can reduce request failures caused by temporary exceptions |
external_cache_ttl | 86400 seconds | The regular update frequency of duty-free policies is daily. Excessively long caching will cause data lag, while excessively short caching will increase interface call pressure |
field_validation_mode | strict | Duty-free fields include exclusive supervision codes. Strict validation can filter invalid data and ensure the accuracy of due diligence reports |
concurrent_request_limit | 2 concurrent requests | Customs interfaces have call frequency limits. Controlling concurrency can avoid triggering rate limiting rules |
error_notify_webhook | Specify internal alarm address | Abnormal duty-free data directly affects the validity of due diligence reports. Timely receipt of alarm notifications is required |
The parameter values provided on this page are all conventional recommendations used as starting points for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require specific analysis. It is recommended to test on your own samples before finalizing settings.
Three common mistakes
- Phenomenon: External interface calls return the
403 Forbiddenstatus code. Cause: Whitelist permissions for exclusive duty-free interfaces are not configured. Customs or duty-free shop systems only allow registered cooperative IP addresses to access. - Phenomenon: Duty-free quota fields are empty in due diligence reports. Cause:
field_validation_modeis not adjusted to relaxed mode. Custom duty-free code validation rules filter valid filing data. - Phenomenon: Scheduled pulls of duty-free policy data are not updated synchronously. Cause:
external_cache_ttlis set too long, exceeding the actual update frequency of policies, and the cache is not automatically refreshed.
How to confirm the configuration is complete
- Call the configured external interface, and verify that returned fields such as duty-free product codes and quotas meet preset format requirements.
- View interface call logs to confirm that retry counts and timeout settings match the configured items, with no abnormal retries or timeout interruptions.
- Compare real-time pulled policy data with the latest official duty-free rules to confirm that cache duration settings match actual update frequencies.
- Trigger interface exception tests to confirm that
error_notify_webhookcan normally receive alarm notifications.
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.