how to go to 7 days inn from baiyun airport?

After getting out of the airport, you can take metro line 3 from Airport South Station to Jiahewanggang Station. Then transfer to metro line 2 to Yuexiu Park Station. Take bus no.273 to Guangyuanxincun. Afterwards, walk northwest around 600 meters to find your hotel. The whole way will take you 1 hour and cost CNY 10/person.

Hello thx for the answer im arrived at 02.05AM. is it still possible to catch a bus?
And is there any maps application that u reccomend to replace google maps that can be used on china?

If you arrive at the airport at the mid night, you may catch the airport shuttle bus line 1 to Airport Road Overpass Bus Stop. Upon arrival, you may walk about 750 meters ahead to find your hotel. This shuttle bus works till the last flight arrival. The ticket fare is CNY15/person.
Well, the most maps are in Chinese, like Baidu Map and Gaode Map. There is another app called City2go, which is an English map but I have never used it before. In addition, you may find the detailed metro maps on the website of TravelChinaGuide and you can also use it as a reference.