Since the end of last year they(the chinese government) have taken aim at the hardcore players, issuing directives to make sure the games have technical blocks hindering excessive game play.
Under the new system, your online character becomes less and less effective. After three hours, the number of in-game "experience points" for, say, killing an opponent are reduced by half.
After five hours you do not get any at all. It is called the fatigue system.
