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Is Chen Chen or the center of mass better in the math contest?
The center of mass is good.

1. In terms of training content, Chen Chen only pays attention to personal experience and skills, while the center of mass provides comprehensive training content for mathematics competitions, including basic knowledge, problem-solving skills and simulation competitions.

2. In terms of student participation, Chen Chen only pays attention to the cultivation of elite students, while the mass center provides different levels of training content for students, which is suitable for students of different levels to participate.