My layover is 2 hours and 5 minutes.Transit visa needed?

Hi - I will be flying from Abu Dhabi to Busan Korea with a stop in Beijing. I am coming into Beijing on Hainan Airlines and departing Beijing for Busan on Asiana. It looks like I arrive and depart out of the International Terminal 3. My layover is 2 hours and 5 minutes. From what I can read, it seems that I do not need a transit visa for this stop over. Am I understanding correctly? Thanks