Hello... Please Help. I am going to Jieyang airport in september 27th 2017.

First, you need to walk to Denggang Bus Station, which is about 300 meters east to the airport. Take bus 9 to Mayang Shichangxi, and then walk across the road to Mayang Shichangs station to take bus 5/6 to Qiaonan Xuexiao.
You can buy the bus ticket when you get on.