Illustrator-How to use one source file differently in another document in illustrator

[lord of the graphic]

How can I transform the sign or number that I put in an unit that has been worked in the unit in the illustrator but used in different places in the document, in different places where the sign is used in the document and the number of places used by the sign. need a different plug-in in illustrator css or illustrator. or is there a simple script code.

[Monika Gause]

You can place (link) an Illustrator file in another Illustrator file.

Or use the CC libraries.

Can you please describe what exactly you want to happen?

[lord of the graphic]

[Monika Gause]

One document? two documents? Where should the content come from? Can you please explain your workflow?

Doesn't matter if you use a few more words and step by step will be very helpful.