Transit visa enquiry

Hi Team,

I am currently holding a Philippine passport, an NZ resident permit holder. Do I need to hold a valid Chinese transit entry permit if I'm going to have a connecting flight in Guangzhou Airport for my travel from Auckland to Manila for just less than four hours layover? The Airline is China Southern Airlines. Does that airline have the transit service? I just need to make sure before I confirm my booking. So that I'll have no problems at all

Please advise.
Thanks!