1, you can find a large size to upgrade with your copy, which is the fastest. It is best to have friends to play with. It's better to have bigger friends. 2, but if you can't find it, you can only upgrade the task. In fact, the task is also very interesting, and you can meet players who work together. Since you call yourself Xiao Bai, it is not recommended that you upgrade your freak.

4, another is that you sell cards and upgrade your consumption quickly, but be careful of scammers.

5. Find a substitute.

Consider the above five methods by yourself.

I have practiced three tubas, all of which are very interesting to upgrade. Play on the battlefield when you are bored (going to the battlefield is also for experience). Sometimes I make copies with others and ask for help.