Can I take any domestic airline from Guangzhou to Hangzhou?

Pls I want to know whether I can take any domestic airline from Guangzhou to Hangzhou after I have just arrived in Guangzhou airport. Basically, I'm going to Hangzhou but I booked my flight to Guangzhou and I will take domestic flight to hangzhou. It mean I have two tickets. One from my home country to Guangzhou and and I will spend few hours in the airport and take the second flight to Hangzhou. Is it allowed?