I have just migrated sucessfully from joomla com_content to K2.
My Joomla articles do not have the images uploaded under the "Images and links" section. Images are only in the article body and the first image will be shown as thumbnail in "Category blog" view.

Please advise how can I do the same for items in K2.
With reference to the item edit screen of K2 - The first image in an item (articles in my case) will be copied or moved from K2's "Content" to K2's "Image".

You can refer to the screen shot attached to understand what "Content" and "Image" of K2 that I am talking about.

Hi. Have you tried this plugin getk2.org/extend/extensions/616-iaki-import-as-k2-image ?

Thanks Lefteris.
I have installed but seem that the plugin is not working with either my template or the latest version of K2??
All settings in the plugin are left blank by default.
I have also tried to remove all items in K2 and redo the "Import from Joomla".
My template is Gavick Pro News 2 (april 2014)

Are there any other setting or setup that I have missed?

Check this link. evergreen.vn/index.php?option=com_k2&view=itemlist&layout=category&task=category&id=68&Itemid=1044
The 2 images shown are added manually by me.

Have you enabled the plugin? The link you provided is not working.

Yes I am sure that the plugin is enabled right after I finish the installing
Here is the working link
evergreen.vn/index.php?option=com_k2&view=itemlist&layout=category&task=category&id=51&Itemid=1033