Travel Guangzhou and HK

I hold a Thailand passport. I will fly to Guangzhou Baiyun International Airport, travel at Guangzhou for 2 days 2 nights and day 3 will go to travel for HK 1 day 1 night and come back to Guangzhou in day 4 for fly back Thailand at Guangzhou Baiyun International Airport. Is it possible to travel like this? Please clarify does this have any restriction on entry to China and HK?