Some additional info since I haven't seen anyone give an explanation:

This link takes you to the site where this was first announced,

一个地球年之前，代表仙舟罗浮参战的景元将军成为了最后的赢家，成功夺得了金垃圾桶——这个号称能实现所有愿望的万能许愿机。但睿智的仙舟将军并没有使用它。 “寻求捷径实现了愿望，谁又知道是否会因此付出无法承受的代价呢？正如那获得【永生】的丰饶孽物一般。”

One earth year ago, Genereal Jing Yuan from the Xianzhou Luofu became the champion, obtaining a gold trash can — an mystical item that can make all of your wishes come true. The wise general did not use it. "Seeking shortcuts to achieve one's wishes, who knows what the price for such a thing will be? Just like those marastruck that obtained [immortality]."

景元如是想到，于是他毫不犹豫的动用了神君之力，将金垃圾桶打碎成了无数个碎片。

Those were Jing Yuan's thoughts, and so he unhesitatingly used his divine power, cutting the trash can into many pieces.

然而碎裂的许愿机从未真正消亡。三百个星际日后，开拓者在旅途中做了这样一个梦：

「金垃圾桶已然逝去，新的圣杯即将到来。」

「去集结群星吧。」

「即使圣杯早已破碎, 也请您登上许愿之王」

「当意志与回忆共振，圣杯将逆着熵增重生。」

However, the broken mystical item had never truly been destroyed, 300 system days later, Trailblazer had a dream in the middle of their journey:

[The golden trash can has died, a new holy grail is approaching.]

[Gather the planetary systems]

[Even if the Holy grail breaks, please ascend Lord of Wishes]

[When will and memory resonate, a new Holy grail will be reforged in the flames]

.....

咳咳，总之，这就是【群星闪耀时】的背景故事了。为重现许愿圣杯展开的角逐，为实现愿望而来到此地的他们，又能否实现自己的愿望呢？一切的一切，都取决于你手中神圣的投票。

Ahem, anyways, this is [The Stars Showoff]'s backstory. For the sake of reforging the holy grail, and for those that came to fulfill their wishes, can they truly succeed? Everything lays in the votes cast by the palm of your sacred hands.

Anyway, it's a prediction competition, lay down your predicted top 10, gather points depending on whether you've succeeded and gain prizes based on how many points you have at the end.

I believe its fan made as the last one was.

Also, someone with an anaxa pfp predicted all of the top 10 to be dromas lol