How to renew china passport in Sydney?

hi u answered my question but where about do i go in sydney as there is one in camperdown and one in elizabeth street sydney. which office do i go to renew my passport and if there is a form online to fill out the passport form as you have advised or do i need to go direct to office to get form. you also advised that i will need to prove if i have got the permanent Australian resident permit for more than two years, you need to additionally submit a certificate proving that you have not join Australian nationaliy. how do i get this certificate to rectify i have not join australian nationality? or are you advising about the visa that states my pr residency shown on my china passport. please advise as i would like to be accurate in renewing my china passport