A good registration process should be "low-key".

"I'm just a regular user who wants to post a supply message on Alibaba. I don't want to fill out those long and annoying forms." I always get the sense that users are complaining in front of their computers. We've placed many entry points for posting products on our site, but just as users become interested and want to try posting something, they're interrupted by registration or login requirements. This frustrates users greatly, and the consequences can be severe!