What the data for this category looks like
Coal chemical industry financial report data primarily comes from periodic reports of listed companies disclosed by the Shanghai Stock Exchange and Shenzhen Stock Exchange, research briefings released by the China Coal Chemical Industry Association, and monthly operational data independently disclosed by enterprises. Update cycles are categorized as annual, quarterly, and monthly. Annual reports are disclosed once per year. Quarterly reports are updated each quarter. Industry briefings are released monthly. Documents typically include consolidated financial statements, detailed production capacity and output data, raw material and energy consumption data, product revenue composition explanations, and project construction progress content. Fields include product output, unit production cost, raw material procurement volume, and more. Corresponding units are mostly ten thousand tons, yuan per ton, hours, and others.
What constraints do these characteristics impose on the document parsing and chunking step
Coal chemical financial report documents contain mixed-format content. They include both standardized financial tables and unstructured project description text. Conventional chunking logic can easily break the association between tables and their corresponding text. The units of fields disclosed by different enterprises vary. Some enterprises use tons as the unit. Others use ten thousand tons. Chunking must retain context binding between fields and their units to avoid unit confusion during subsequent retrieval. The length of individual documents varies widely. Monthly briefings are only a few pages long. Annual reports can reach hundreds of pages. Chunking logic must adapt to documents of different lengths to avoid excessive truncation of long documents or excessive splitting of short documents. Industry-specific terminology such as coal-to-olefins, crude benzene refining, and others must retain complete context to avoid semantic fragmentation after splitting.
How to set the configurations
| Configuration Item | Recommended Value Range | Rationale |
|---|---|---|
chunkSize | 800–1200 characters | Adapts to the text length of coal chemical financial reports, avoids breaking the association between professional terminology and table-related content |
chunkOverlap | 100–150 characters | Retains context association across segments, adapts to long texts and cross-page table content |
tableParseMode | Full table block | Retains the complete structure of capacity and cost tables in coal chemical financial reports, avoids splitting table data |
PARSE_FILE_TIMEOUT_SECONDS | 600 seconds | Adapts to the parsing duration of annual financial reports with hundreds of pages per document |
UPLOAD_FILE_MAX_SIZE | 1000 MB | Supports batch upload of annual financial reports and industry collection documents |
splitMode | Prioritize by chapter | Splits chunks first according to the chapter titles of financial reports, adapts to structured financial report documents |
The parameter values provided on this page are common starting points for configuration. Actual values are affected by material format, 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: When parsing large coal chemical annual reports, errors occur where a single segment of text exceeds the set length, or chunking results are forcibly truncated. Cause: The unit of
chunkSizeis not clearly defined as characters, and the byte count is mistakenly used as the reference for value setting, or thesplitModeis not adjusted to adapt to structured documents. - Phenomenon: After calling the FastGPT 4.8.10 version API to parse financial reports, the returned results do not include the chunk index field. Cause: The
includeChunkIndexswitch is not enabled in the API request parameters, or there are compatibility issues with the API parameter configuration of this version. - Phenomenon: When clicking to copy chunk content on the frontend page, a prompt pops up stating "Unable to use browser automatic copy, please manually copy the content below". Cause: There is a same-origin policy restriction on page deployment, the browser cross-domain copy permission is blocked, and the copy logic is not adjusted to adapt to this scenario.
How to confirm the configuration is correct
- Upload the annual financial report document of a coal chemical enterprise, view the parsed chunk list, confirm that the table content is not split, and check that the chunk length matches the set
chunkSizeparameter. - Call the document parsing API, check whether the returned results include the chunk index field, and confirm that it matches the configuration of the
includeChunkIndexparameter. - Upload a single industry report with more than 300 pages, check the status of the parsing task, and confirm that no timeout error corresponding to
PARSE_FILE_TIMEOUT_SECONDSis triggered. - Test coal chemical financial report documents in different formats (PDF, Word), confirm that the parsed chunk structure meets the configuration requirements of
splitMode.
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.