I set the bonus value of the custom opportunity cube to
  %%RND(1,99)%% But the probability of repeated occurrence is still very high A total of 30 custom rewards

I'm not sure I quite follow what the issue is

Um, I use the creation of the pendant to set the 0 bonus value. Then in the custom configuration, 30 rewards are all set to 0. The repetition is reduced.

Ohhhhhh. Are you setting the Chance value to %%RND(1,99)%%? I.e does your json have the line "chance:"%%RND(1,99)%%""?

:-| Didn't understand

You have 30 rewards correct? Each with a chance value of 0? And is the issue that the same ones are being given over and over?

Well, all is correct and can be used

Can you show me one or two of your reward json's?

Sorry, I may be busy, I will send you.

https://imgur.com/nEWgIPl

All my custom configurations are in this picture

You probably meant to do

"jz12":{
    "chance":"%%[1,2,3,4,6,8,10]%%"
    ...
}

as chance is the "opportunity" value that I think you are referring to. That being said, the chance value cannot accept dynamic values so %%[1,2,3,4,6,8,10]%% will not work. It must be a number.

you have

"jz12":{
    "delay":"%%[1,2,3,4,6,8,10]%%"
    ...
}

and also the same in the jz13 file as well.
This delay element is not supported here. On top of this, all of your rewards are missing a chance value, which is why they are defaulting to 0.

! I am very sorry, I completely read this wrong.

I apologize, I will wait a little longer to change it again, try

Which one.. Is the opportunity value written the same way?

I still don't understand how to rewrite

Ok, it seems that there is no random chance now.