i am from pakistan but now a new zealand citizen. Do i need a Transit visa if i am travelling to pak

as far as i know newzealanders are eligible for 24 hour visa on arrival but last time i was travelling to pakistan i was denied the visa with no reasons. Does it means i have to apply for Transit visa if i want to travel via china everytime. I want to go out becuase the times between the flights are too long, 10 hour going and 17 hours coming back.