Dear @Yi Dong,
another way, without plugins, is to import your csv file with a couple of simple script that make use of the REST API. There you can create issues with parent/epic relations.
Of cause this will require little coding skills in one of the scripting languages like PHP, python or perl.
So long
Thomas
Hello Yi Dong,
You can use the Structure for JIRA add-on to perform this operation, as you can see in the answer below:
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