# CMB (Chinese Medical Benchmark)

License: permissive (Apache-2.0); Mdexa hosting: link-only. License is permissive, but source risk: questions come from copyrighted exams; link only.

- Commercial use: Yes · Derivatives: Yes · Redistribution: Yes · File on Mdexa: No
- License status: Permissive (Apache-2.0)
- Mdexa hosting: Link only — License is permissive, but source risk: questions come from copyrighted exams; link only.
- Code repository license: Apache-2.0 (license-file, verified)
- Source risk: Exam-derived
- Last verified: 2026-11-12
- Card: https://mdexa.com/datasets/cmb/

## Key facts

- Domain: Clinical medicine
- Content type: Question banks and benchmarks, Clinical cases
- Size: 11,200 questions (CMB-Exam test); 280 questions (CMB-Exam validation); 269,359 questions (CMB-Exam train); 74 cases (CMB-Clin) — CMB-Exam 测试集11,200题、验证集280题、训练集269,359题；CMB-Clin 74例病案
- Language: Chinese
- Modality: Text
- Publisher: FreedomIntelligence（深圳市大数据研究院支持）
- Year: 2023

## Commercial use of CMB (Chinese Medical Benchmark)

- Commercial use: Yes.
- License status: Permissive.
Verdicts record what sources state and are not legal advice.

## CMB (Chinese Medical Benchmark) license evidence

Repository and dataset card both state Apache-2.0

- **Repository license file** — Apache-2.0: GitHub repository license: Apache-2.0 — "Apache License Version 2.0, January 2004" — https://github.com/FreedomIntelligence/CMB (2026-11-12; Page opened)
- **Hugging Face card metadata** — Apache-2.0: Hugging Face dataset card metadata: Apache-2.0 — "license: apache-2.0" — https://huggingface.co/datasets/FreedomIntelligence/CMB (2026-11-12; Page opened)
- **README**: README has no separate data license [Note: No license statement seen in snapshot s03, s04, s05] — https://github.com/FreedomIntelligence/CMB (2026-11-12; Page opened)

## Source and lineage

The page does not state where the questions come from; the paper title describes a comprehensive Chinese medical benchmark

## Known issues with CMB (Chinese Medical Benchmark)

- The page does not state the source of the exam questions
- Sources include national medical licensing exam questions; in August 2026 the National Medical Examination Center issued a statement asserting copyright over past exam questions, so there is a source copyright risk

## Preflight

Not run (data not ingested).

## Downloading CMB (Chinese Medical Benchmark) and API access

Mdexa does not serve files. Original source:
- https://github.com/FreedomIntelligence/CMB
- https://huggingface.co/datasets/FreedomIntelligence/CMB

### Access recipe

- .gitattributes · 2 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/.gitattributes
- CMB-Clin-qa.json · 260 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Clin-qa.json
- CMB-Clin/CMB-Clin-qa.json · 260 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Clin/CMB-Clin-qa.json
- CMB-Clin/a · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Clin/a
- CMB-Exam/CMB-test/CMB-test-choice-hierarchy.json · 1 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-test/CMB-test-choice-hierarchy.json
- CMB-Exam/CMB-test/CMB-test-choice-question-merge.json · 6.0 MB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-test/CMB-test-choice-question-merge.json
- CMB-Exam/CMB-test/a · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-test/a
- CMB-Exam/CMB-train/CMB-train-hierarchy.json · 1 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-train/CMB-train-hierarchy.json
- CMB-Exam/CMB-train/CMB-train-merge.json · 148.5 MB · sha256 6539cb96d81e0672d18b0ea255b2f040dda2ec90095916d7620969d0ce8eb01d · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-train/CMB-train-merge.json
- CMB-Exam/CMB-train/a · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-train/a
- CMB-Exam/CMB-val/CMB-val-hierarchy.json · 1 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-val/CMB-val-hierarchy.json
- CMB-Exam/CMB-val/CMB-val-merge.json · 601 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-val/CMB-val-merge.json
- CMB-Exam/CMB-val/a · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-val/a
- CMB-Exam/a · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/a
- CMB-datasets.zip · 30.1 MB · sha256 246acbb40a4406b7c5457ad885379f76c24cdf7d3487adcdb17d8d8d557221b7 · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-datasets.zip
- README.md · 9 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/README.md
- assets/CMB-2.svg · 255 KB · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/CMB-2.svg
- assets/CMB-final.png · 1.0 MB · sha256 1ac0f8261ff0d0f2e4cfef7d44d48b7a5541e5a7f769a318b143bf1f82e62ccb · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/CMB-final.png
- assets/CMB-qa.png · 344 KB · sha256 65f9bfb0b5a8bf56f18a00b98c84a03dc890d2b0f78a8d592c0304205e4ec146 · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/CMB-qa.png
- assets/test · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/test
- assets/title.png · 119 KB · sha256 645e4f830d2a40d0a11e2f1d843f814223ab389998d8924f7d4d9693758ab81e · https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/title.png

```sh
curl -L --create-dirs -o ".gitattributes" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/.gitattributes"
curl -L --create-dirs -o "CMB-Clin-qa.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Clin-qa.json"
curl -L --create-dirs -o "CMB-Clin/CMB-Clin-qa.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Clin/CMB-Clin-qa.json"
curl -L --create-dirs -o "CMB-Exam/CMB-test/CMB-test-choice-hierarchy.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-test/CMB-test-choice-hierarchy.json"
curl -L --create-dirs -o "CMB-Exam/CMB-test/CMB-test-choice-question-merge.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-test/CMB-test-choice-question-merge.json"
curl -L --create-dirs -o "CMB-Exam/CMB-train/CMB-train-hierarchy.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-train/CMB-train-hierarchy.json"
curl -L --create-dirs -o "CMB-Exam/CMB-train/CMB-train-merge.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-train/CMB-train-merge.json"
echo "6539cb96d81e0672d18b0ea255b2f040dda2ec90095916d7620969d0ce8eb01d  CMB-Exam/CMB-train/CMB-train-merge.json" | sha256sum -c
curl -L --create-dirs -o "CMB-Exam/CMB-val/CMB-val-hierarchy.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-val/CMB-val-hierarchy.json"
curl -L --create-dirs -o "CMB-Exam/CMB-val/CMB-val-merge.json" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-Exam/CMB-val/CMB-val-merge.json"
curl -L --create-dirs -o "CMB-datasets.zip" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/CMB-datasets.zip"
echo "246acbb40a4406b7c5457ad885379f76c24cdf7d3487adcdb17d8d8d557221b7  CMB-datasets.zip" | sha256sum -c
curl -L --create-dirs -o "README.md" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/README.md"
curl -L --create-dirs -o "assets/CMB-2.svg" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/CMB-2.svg"
curl -L --create-dirs -o "assets/CMB-final.png" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/CMB-final.png"
echo "1ac0f8261ff0d0f2e4cfef7d44d48b7a5541e5a7f769a318b143bf1f82e62ccb  assets/CMB-final.png" | sha256sum -c
curl -L --create-dirs -o "assets/CMB-qa.png" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/CMB-qa.png"
echo "65f9bfb0b5a8bf56f18a00b98c84a03dc890d2b0f78a8d592c0304205e4ec146  assets/CMB-qa.png" | sha256sum -c
curl -L --create-dirs -o "assets/title.png" "https://huggingface.co/datasets/FreedomIntelligence/CMB/resolve/935fbc09edf1303d89872b21265ff597f426ac0d/assets/title.png"
echo "645e4f830d2a40d0a11e2f1d843f814223ab389998d8924f7d4d9693758ab81e  assets/title.png" | sha256sum -c
```

## Citing CMB (Chinese Medical Benchmark)

No recommended citation text.

## Machine-readable

- JSON: https://mdexa.com/datasets/cmb.json
- 2026-11-13 Added specialty tags: multi-specialty(author-stated).
- 2026-11-13 Removed the stored size-tier tag; the tier is now computed from the size field when pages are built.
- 2026-11-13 Added dataset-level tags: 11 (9 stated by the authors with excerpts, 2 inferred from the content). No conclusion changed.
- 2026-11-12 Recorded the code repository license separately; it is not treated as a data license statement.
- 2026-11-12 Added verbatim license excerpts and snapshot ids from captured page snapshots; no conclusion changed.
- 2026-11-12 License status split into license_status (what the license says) and hosting (what Mdexa does); the earlier conclusion is kept for traceability.
- 2026-11-12 Card converted from an earlier manual catalog; no new facts added; reclassified under taxonomy v2.

## Continue in this database

This record is one of 109 processed and verified records (datasets, data resources and open models). To find others, call `https://mcp.mdexa.com/v1/datasets?q=<words>` or connect the MCP server at `https://mcp.mdexa.com/mcp`; no key is needed for 20 calls per minute. Rows are under 1 KB; an empty result means "not listed". For a list of items, one batch check (free account) returns a report. Guide: /agents.md. Similar records: MedMCQA (https://mdexa.com/datasets/medmcqa/); 医学考试题库 JSON 数据集 (https://mdexa.com/datasets/medical-exam-question-bank-json/); DiagnosisArena (https://mdexa.com/datasets/diagnosisarena/).