What the data for this category looks like
Data sources include public monthly reports from the China Construction Machinery Industry Association, quarterly financial reports and product parameter manuals officially disclosed by original equipment manufacturers (OEMs), real-time operation logs from equipment operation and maintenance platforms, and public information on government procurement and bidding. Update cadence is as follows: Static product parameter documents are updated synchronously when OEMs launch new products; industry prosperity and bidding data are updated weekly or daily; operation logs are synchronized in real time. Document structure includes standardized parameter fields: equipment model, rated power, operating weight, bucket capacity, with corresponding units of kW, kg, m³ respectively. It also includes unstructured industry analysis documents and bidding winning detail documents.
What constraints do these characteristics impose on the model access and configuration link
The standardized fields and fixed update rhythm of static product parameter documents require configuring structured data parsing rules in the model access link to ensure consistency of parameter extraction. The high-frequency update requirements of real-time operation logs and bidding data require the recall link to adapt to low-latency data synchronization configurations. Multi-format unit fields (such as kW and horsepower for power) require configuring unit normalization mapping parameters to avoid model output confusion. Long-form industry analysis documents require configuring reasonable segmentation and context window parameters to avoid truncation of key information.
How to set configurations
| Configuration Item | Recommended Value | Rationale |
|---|---|---|
maxContext | 8000–16000 characters | Adapts to the content length of long-form industry analysis documents and equipment parameter manuals, avoiding truncation of core professional information |
chunkSize | 1000–1200 characters | Ensures semantic integrity of professional terminology and parameter fields in construction machinery, avoiding damage to information coherence during splitting |
embeddingModel | text-embedding-ada-002 / local open-source embedding model | Adapts to semantic vector extraction requirements for structured parameters and unstructured analysis documents, supports commercial and local deployment scenarios |
recallTopK | Top 8–12 entries | Covers multi-dimensional relevance of equipment parameters, industry data and bidding information, balancing recall coverage and precision |
PARSE_FILE_TIMEOUT_SECONDS | 300 seconds | Adapts to the parsing time requirement of large OEM product manuals, avoiding parsing failure of large documents |
similarityThreshold | 0.75–0.85 | Matches the semantic similarity matching accuracy of professional terminology in construction machinery, adapting to retrieval requirements in investment research scenarios |
The parameter values provided on this page are all conventional recommendations used as a starting point for configuration. Actual values are affected by material form, data volume and business rules. Specific issues require specific analysis, and it is recommended to conduct tests on your own samples before finalizing the configuration.
Three common configuration errors
- Phenomenon: The commercial backend cannot find the access entry for overseas large models, with an error prompt "Corresponding model permission not activated". Cause: The permission application process for commercial version exclusive models has not been completed, and the API key of the corresponding service provider has not been bound.
- Phenomenon: After deploying version 4.9.9, the local model access entry disappears, and local LLMs cannot be configured. Cause: The quick access switch for local models is disabled by default in this version. Modify the configuration file manually to enable the corresponding module.
- Phenomenon: After accessing the local embedding model, the number of recall results is abnormally small. Cause: The access port and key of the embedding model have not been configured, or the input text length exceeds the maximum token limit supported by the model.
How to confirm the configuration is complete
- A construction machinery product parameter manual is uploaded. The parsed data is checked to confirm full extraction of preset professional fields, and field units are verified to have completed normalization conversion.
- A retrieval request for equipment parameters or industry data is initiated. The relevance and coverage of recall results are reviewed, and corresponding configuration parameters are adjusted until they match business requirements.
- The calling process of local models or overseas large models is tested. Normal interface returns are confirmed, and no permission or connection errors are present.
- System operation logs are reviewed. Records of file parsing timeouts or model call failures are troubleshooted, and the rationality of configured timeout times and parameters is verified.
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.