Meet the Chinese MMA Fighter Taking on the Grandmasters of Kung Fu

Fighters aren't usually the blushing type. But Xu Xiaodong can't hide his embarrassment when asked about his latest battle scar, a three-inch crimson railroad track that snakes over his right eyebrow. It was caused, he says, by an overzealous opponent's knee at a recent training session, during which Xu grappled with four younger mixed-martial-arts (MMA) fighters in quick succession. "I was tired by the end and bam!" Xu tells TIME in his Beijing gym.