We have finished the work and are now planning to submit it. We are targeting a journal. But then we found the journal is only six pages. Six pages only allow us to write down our brief idea and some conclusions. So we have to omit a lot of details in the paper. But we also want to publish those details. Is it possible that we submit the work to the journal first and then extend the journal paper with the details and submit it to another conference? Are there any better solutions? Thank you!