What's the meaning of the flag of the volleyball teenager Yinma?

The junior silver flag of volleyball refers to the flag of the volleyball team of Yinju College.

Yinzhou University is a Japanese cartoon "Volleyball Boys! ! "School" and its derivative works. The traditional strong school in Tokyo is called "Cat", which is a long-term competitor of Wu Ye University and a "declining strong school". There is no particularly outstanding attack, the whole team is very good at catching the ball, and there is no loophole in defense.