You must get several second-class referee certificates after graduation ~ ~

It can be said that his role is not great. Compared with football and basketball, tennis is a new sport in China. It should be used in the next few years.

It is better to learn tennis well than to take the referee's certificate. It may be more useful than the referee card ~ ~

Then I suggest you don't have to do it, teacher. These are all scams ~ ~ It's useless for you to take these cards ~ We who study sports ourselves will know what's going on inside ~ ~