You Need to Charge Money to Become Stronger.

"Tip... Do you want to upgrade the card 'Fire Lin Fei'?" Qin Feifan thought for a while, this rising star should make him stronger, right? No need to think about it! ..."Yes." "Dip... The system has detected that the host's existing balance is insufficient. Do you want to recharge?" Qin Feifan: "..." Inner OS: Lost it! Come on at the critical moment, uncle, what kind of broken system is this? You still have to recharge to upgrade your star! So the saying that you can become stronger only by charging money is never a joke? Qin Feifan: "Then... What should I use to recharge?" "Cash or card?" Qin Feifan: "???"