from domestic to international flight at Baiyun Airport.

Hi,please I have an international flight from Guangzhou to Ethiopia at 00h30am on August 02 but im currently living in Hangzhou.im planning then to take a flight to GZ at 6pm on the 01th august and arrive at 8pm.will the laps of time be enough to finish the arrival and departure procedures on time before boarding my international flight at CAN? and what could be the right means for me to avoid any hustle especially about my luggage