Du Pengyu, my heartiest congratulations for winning bronze in the World Championshps 2013. Indeed, a worthy medallist together with Viet Nguyen Tien Minh, another commendable hard worker like you.
What impressed me the most is how you could still put up such a spirited fight against the mighty Lee CW in the semi-final despite having played four previous rounds of long,grueling,energy-sapping matches with every single one of them, all highly respectable opponents, namely Shon Wan Ho, Tanongsak S, Takuma Ueda, and P Kashyap, taking a total of four over hours.
You actually pushed Lee CW hard to three well-fought games before capitulating, a much better performance than Wang Zhengming's and Tommy Sugiarto's who both lost easily in short 2-setter matches to Lee CW before you. As a matter of fact, as Jonc108 pointed out in his calculations, your total time duration on court was about 4 hours and 45 minutes whilst Lee CW's was about 2 hours and 50 minutes, i.e. 2 hours longer. I'm surprised you didn't collapsed exhausted after the 1 hour and 10 minutes match with Lee CW, your 5th match of the tournament, yet another long tussle. I salute you !