Dong-bin Han has been controlling the pace of this heads-up match repeatedly betting at and raising David Hilton, especially before the flop. He has been three-betting Hilton relentlessly, with little pushback from Hilton. Hilton may have realized what's going on, because he opened a recent pot to 100,000, faced a re-raise to 335,000 from Han, and then fired back another 400,000 himself. That slowed down Han and induced a fold.