You can't file 485 until
your priority date is before the date listed on visa bulletin. For EB3, you can file I485 only if your LC filing date is on or before 01/01/01 if you were born in China.
http://travel.state.gov/visa/frvi/bulletin/bulletin_2744.html
http://travel.state.gov/visa/frvi/bulletin/bulletin_2744.html