How far is Guangzhou airport from dongue hotel

I guess you mean Dongyue Hotel the one located at No. 8 Lujing Road? You may take the airport shuttle bus No. 2A to Crowne Plaza Guangzhou City Centre and then walk there, around 1km away. Or you may take the subway lin 3 from airport to Jiahewanggang and then to line 2 there to GZ Railway station and finally change to Line 5 there to Xiaobei station. The hotel is around 700m away from the C exit.