Hi, how to get to Yu Ting Hotel at 421 Yuanjiang East Road from Guangzhou Baiyun Airport. Thanks.

Oh, you must refer to East Yanjiang Road.
It's suggested to take subway line 3 at the airport, and get off at Yantang Station. Then transfer to line 6 to Donghu Station, Exit A. It takes around 50 mins on the way. And the ticket fare is CNY 8 per adult.
After that, walk south along Donghu Road about 380 yards. Then walk about 400 yards west along Dashatou Road.