The **Hong Kong Mathematical High Achievers Selection Contest (HKMHASC)** is a territory‑wide mathematics competition for secondary school students in Hong Kong. It is jointly organized by the Education Bureau (EDB) of the HKSAR Government and the Hong Kong Association for Science and Mathematics Education (HKASME). The contest features challenging written problems that go beyond the regular school curriculum and aims to identify and encourage mathematically talented students. Participation is arranged **through schools**, which nominate students (typically from junior and senior secondary forms) to sit the competition at designated test centres. High scorers receive certificates, prizes, and public recognition, and the results may be used as part of the selection process for further enrichment programmes or teams for advanced math activities. Students benefit from exposure to non-routine problem solving, experience with competitive mathematics, and an opportunity to benchmark themselves against strong peers across Hong Kong.