In the second half of 2016, the residence permit will be issued, and all of Guangdong will have to register first, and then it will take half a year. Moreover, the validity period of the residence permit is one year at the longest, and the endorsement will be made one month before the expiration.
The following experiences are before the first half of 2016.
I happened to have a residence permit in Guangzhou twice, once for 6 months (2015) and once for 3 years (2016).
The shortest residence permit in Guangdong is six months and the longest is three years.