Do I need a chinese Visa if I visit China from Canada? I have Home Visit Re-entry Permit.

Your answer to my question on July 20th said 'That means you have Home Visit Re-entry Permit? if yes, you can use the automated passenger clearance channels at immigration control points in Shanghai, visa is not required.'

I have not register for the 'automated passenger chearance channels'. Does that means I need to go through Custom? If so, does my 'Home Visit re-entry Permit' good enough to clean custom without a visa?