@WenZhang1 ...
I know that it used to be that ePortfolios and the Folio link were two separate things in Canvas. Folio linked out to Portfolium, which I described above. The Guide you are referencing might be the older ePortfolio interface. You might want to have a conversation with your Customer Success Team at Instructure to see if Portfolium is available to you. If you are not a Canvas administrator, then you can reach out to that person at your school ... or someone from your school's Online Learning / eLearning / Distance Education team, and they can reach out on your behalf. Hope this might help in some way.