What This Category’s Data Looks Like
Data sources for thermal coal financial reports include monthly supply and demand reports from domestic coal industry associations, quarterly and annual financial reports of publicly traded thermal coal enterprises, and industry monitoring data from the National Energy Administration. There are two update frequency categories: industry monitoring data updates monthly, while corporate financial reports are disclosed quarterly and annually. Industry reports include four core modules: supply and demand scale, price range, inventory level, and policy orientation. Corporate financial reports include consolidated financial statements and special explanations of revenue proportion from thermal coal businesses. Field and unit standards vary across sources. Industry data uses units such as yuan/ton, ten thousand tons, and ten thousand tons per day. Financial report data uses units such as ten thousand yuan and hundred million yuan. Unified processing of these unit differences is required.
Constraints Imposed on HTTP Interfaces and External Systems
The multi-source, decentralized nature of thermal coal financial report data requires external systems to connect to multiple independent HTTP interfaces. Multiple data source authentication and permission rules must be configured. Differences in update frequencies require interface scheduling to use two modes: scheduled triggering and event triggering. This avoids invalid API calls. Inconsistent fields and units require API returned data to undergo format conversion to fit downstream analysis logic. Long individual financial report document lengths require the interface’s file parsing module to support long text segmentation. This prevents parsing timeouts or content truncation.
Configuration Recommendations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
CRON_EXPRESSION | 0 0 2 * * * (2:00 AM daily) | Meets daily synchronization needs for thermal coal industry monthly data, avoids peak business hours |
PARSE_FILE_TIMEOUT_SECONDS | 300 seconds | Individual thermal coal financial report documents have long lengths, sufficient parsing time must be reserved |
FIELD_UNIT_CONVERT_ENABLE | Enabled | Thermal coal data uses multiple units such as yuan/ton, ten thousand tons, and ten thousand yuan. Automatic conversion must be enabled to unify formats |
UPLOAD_FILE_MAX_SIZE | 50 MB | Individual annual financial report documents typically do not exceed this threshold, prevents interface transmission timeouts |
SYNC_DATA_BATCH_SIZE | 10 entries | Fits the batch pull rhythm of financial report data, avoids overloading interface requests |
RESPONSE_FIELD_FILTER | Retain fields related to thermal coal businesses | Filter non-core fields to simplify field processing logic for external system integration |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material form, 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
- External financial report API calls return 401 Unauthorized errors, and data cannot be retrieved. Cause: Interface identity token expiration refresh logic is not properly configured. Tokens are not automatically updated after expiration, leading to failed API calls.
- Some core fields are empty when pulling financial report data in batches. Cause: Precise filtering rules for
RESPONSE_FIELD_FILTERare not configured. Key fields related to thermal coal businesses are accidentally filtered out. - API calls return 504 Gateway Timeout errors. Cause:
PARSE_FILE_TIMEOUT_SECONDSconfiguration value is not adjusted. The default timeout duration is insufficient for parsing long thermal coal financial report documents.
How to Verify Successful Configuration
- Call the configured external API, check if returned fields include core data related to thermal coal businesses. Confirm that field mapping and unit conversion take effect.
- Review scheduled task logs to confirm that the API automatically triggers synchronization at the configured time, with no failed records.
- Upload a single thermal coal financial report document to the API, confirm that parsed segmented content is complete, with no truncation or data loss.
- Test identity token expiration scenarios, confirm that API calls resume normal operation after the system automatically triggers token refresh.
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.