之前买的时候放库里吃灰，最近几天突然就迷上了，因为之前买的是普通款，现在突然降价就想买个终极版于是写了篇不算小作文的小作文
Hello, dear stm customer service
I was deeply attracted by this game because I saw it on the video website. Now I want to buy the ultimate version of this game, but there is no upgrade package. So I want to refund the ordinary model and buy an upgraded model. I hope you can understand, thank you.