China Education Cup National College Students' Mathematics Competition belongs to category C, not b2.

The Organizing Committee of China Education Cup National College Students' Mathematics Competition and Jilin Science and Technology Education Association jointly hosted the 20 18 China Education Cup National College Students' Mathematics Competition, aiming at comprehensively testing college students' mathematics knowledge, literacy and ability, stimulating their enthusiasm for learning mathematics, improving their comprehensive application ability of mathematics, and building a platform for young students to show their academic advantages.