from jieyang airport how to get a bus to guangzhou

Well, no direct bus runs between these two places. So you are suggested to take shuttle bus to get to Chaoshan High-speed Railway Station first. The ticket fare is CNY 18 per person.
Then there are many bullet trains that can take you to Guangzhou East/South Railway Station. The schedules are from 08:40 to 20:45. The trip takes around 3 hours. And second class seat costs about CNY164 and first class seat costs about CNY207.