how can i go to jieyang from Hong Kong international airport by bus, i reach on 13th april, 9.30 am

I heard that there is direct bus from HK downtown area to Jieyang Rongjiang Hotel. But I never took it before. You can try to contact the hotel for confirmation.

Or just take the cross border bus to Futian Bus Station from HKIA. And then transfer to a direct long-distance bus to your destination.