I renewed my residence permit last month in my same passport. You'll need to register again. I tried to register entering at PVG earlier in March and the immigration dude told me they had a new requirement (mentioned above) that you need to enter the normal way a couple times before they let you register for e channel now. I was in Shenzhen this past week and decided to try to register at Futian border crossing, the lady there processed my registration and said it would be active in one day. I entered through PVG yesterday using the e channel, so all is set for me for the next two years it seems.