2h30 is enough to move from T3 to T2 and checking in there?

I'm traveling to China next month in two different flights. I'm planning to fly from Spain to Beijing with LOT Polish Airlines, whose plane arrives at 6h30 am (T3), and then moving to T2 to take a second flight to Nanchong that departs at 9 am.
My question is, do I have enough time to move from T3 to T2 or it's better to buy another flight to Beijing?
Thank you so much !!