When I was a child, what did origami, Aoki, virtual copper and gold tattoo mean?

Let's start with origami. In the origami era, the protagonists were still in the student period, relatively pure and not so concerned. In the virtual copper age, they all worked and the pace of life accelerated. Busy work has gradually diluted the proportion of friendship and love, and there is a metallic feeling in the air (Xiao Si said in an interview that these names do not represent any special significance, but his feelings about the plot of the book, and he said that there may be a book called "Diamond Age" published in the future), so it is called virtual copper; The same is true of stabbing gold; Except Aoki, this is a cartoon adapted from the original. I don't quite understand the meaning of this name. In fact, there is no need to delve into it. Just like watching ~ ~