CSIMC are worldwide contests organized by the Faculty of Mathematics, Universities of Waterloo. These contests are also called Canadian Mathematics Competition which is a Canadian official contest with almost ten thousand contestants each year.
加拿大中级及高级数学竞赛是由加拿大滑铁卢大学数学学院（The faculty of Mathematics, Universities of Wateroo）举办的全球性数学竞赛，又被称为“加拿大数学竞赛”(Canadian Mathematics Competition)，是一项官方数学竞赛，每年都有数万名学生参加。
Why should students write these international contests?
These contests will help develop your problem solving skills and prepare you for university.If you're none-native-English speakers,you're particularly encouraged to write the Euclid Contest to demonstrate that you have sufficient mathematical and English language background to enter programs of universities.