It is helpful for studying abroad to participate in some competitions at the undergraduate stage. The following are some common competitions that can improve your comprehensive quality and competitiveness and add a lot of color to your application for going abroad:

1. International Mathematical Modeling Competition (MCM/ICM): This is a global mathematical modeling competition that requires participants to solve practical problems within a limited time. This competition can exercise your mathematical modeling ability, teamwork ability and English writing ability.

2.COMAP: This is a mathematical modeling competition for American college students, similar to MCM/ICM, but less difficult. Taking part in this competition can improve your mathematical modeling ability and English writing ability.

3. national english contest for college students (CET-SET): This is a national English proficiency test, which is divided into two parts: written test and oral test. Taking part in this competition can improve your English listening, speaking, reading and writing skills.

4. National College Physics Competition: This is a national physics knowledge competition aimed at improving students' physics literacy and innovation ability. Taking part in this competition can improve your physical knowledge and experimental ability.

5. National College Students' Chemical Experiment Competition: This is a national chemical experiment skill competition, aiming at improving students' chemical experiment ability and innovation ability. Taking part in this competition can improve your chemical experiment skills and innovation ability.