With the help of @whitewatercn-6327, I successfully withdrew the MIRA sent by the official and converted it to USDC. Later, I found that the fuel was almost running out, so I explored and found that I could convert some MATIC through the following path on the Polygon official website (I hope this little tip can help students who are newbies like me and have the same troubles 😂):
Doing this has two benefits: on the one hand, it can conveniently be used as the operating fuel fee on Polygon in the future; on the other hand, it is also hoped that this act of kindness can be passed on. If any students in need can leave your Polygon address in the comments section, I will transfer 0.3 MATIC to five of them. For specific operating methods, you can refer to @白水房's article.
After successfully withdrawing, please pass on this kindness and assistance in any way you like, and let xLog's vitality continue to increase! 🤗