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Hi @wu_chenlei welcome to the Atlassian Community!
To add/edit a workflow step or transition property:
Go to Administration > Issues.
In the left panel, select Workflows.
For a workflow where you want to set a property, select Edit.
Select a status or transition you want to add a property for.
In the menu, select Properties.
You’ll be brought to a page where you should enter the key and value of a property.
Select Add.
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