hi i will travel from Brisbane to manila and i have stop over at Guangzhou airport

next day i will travel from brisbain airport to manila airport and i have a stop over over there at GZ airport and im scared because this is my first time to do over stop. what should i do and where the departure of this airport. my airlines is CHINA SOUTHERN AIRLINES is that in international terminal? because i dont know what would be my terminal for my departure over there in guangzhou airport. and do i need to go to the immigration still or i will direct to my gate section please help me for all of this. i will very please for the help thank you so much.