# Chinese Mathematical Olympiad (CMO)

China’s premier national high school math Olympiad and selection contest for the IMO team.

## Key facts

| Field | Value |
| --- | --- |
| Organization | Chinese Mathematical Society |
| Category | stem |
| Cost | Free |
| Deadline | 2026-12-01 |
| Eligibility | Grades 9–12 |
| Format | In person |
| Location | Check official site |
| Apply | http://www.cms.org.cn |

## About this program

The Chinese Mathematical Olympiad (CMO) is China’s top national mathematics competition for high school students, serving as the final selection stage for the Chinese team that competes at the International Mathematical Olympiad (IMO). It is organized annually by the Chinese Mathematical Society, typically held in late December or early January, and brings together the country’s strongest contestants from earlier rounds of the national Olympiad system.

Participation in the CMO is by invitation only: students must first excel in provincial and regional Olympiad contests in China to qualify. The exam features challenging proof-based problems in algebra, number theory, geometry, and combinatorics, designed to test deep problem‑solving ability and mathematical creativity. High performers may be selected for intensive national training and have the opportunity to represent China at international competitions, gaining significant recognition and a strong foundation for future studies in mathematics and related fields.

## Frequently asked questions

### How much does Chinese Mathematical Olympiad (CMO) cost?

Chinese Mathematical Olympiad (CMO) is completely free — there is no participation fee. Costs like travel or optional materials may still apply; check the official site for details.

### What is the application deadline for Chinese Mathematical Olympiad (CMO)?

The application deadline is December 1, 2026. Always confirm on the program's official site, as dates can shift between cycles.

### Who is eligible for Chinese Mathematical Olympiad (CMO)?

Chinese Mathematical Olympiad (CMO) is open to high school students in grades 9–12. Some programs have additional requirements (GPA, coursework, essays, or recommendations) — the full criteria are on the official site.

### Is Chinese Mathematical Olympiad (CMO) online or in person?

Chinese Mathematical Olympiad (CMO) is an in-person program.

### How do I apply to Chinese Mathematical Olympiad (CMO)?

Apply directly through Chinese Mathematical Society's official website. ExtracurricularHub links to the official application — we list and verify programs but don't process applications.

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Last updated: 2026-07-04.
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