As you know, when we work on a workflow instance, we can set/get some variables to process instance level. so we can use it in any nodes of process instance.
does n8n have this idea?
how i set some values in current workflow instance and use that values in later nodes?
Hi @Shawn-Yang-AWX, welcome to the community 
You should be able to reference any previous value through expressions in n8n. In this example, the last node will read the original value from the “Set Initial Value” node:
So you can essentially use any node of your workflow as a variable storage 
