Lou Cheng's was experiencing mixed feelings. He was happy that he was able to fight Lin Que, something he'd wanted to do for quite some time. There was a satisfaction in meeting his match and being able to fight until his heart's content. However, he was also inflicted by a kind of feeling called 'f*ck my life.' Lou Cheng wanted to challenge Lin Que after mastering the 'Thunder Roar Zen,' but he was instead defeated by a similar martial arts force which had left his body shaking. The experience was pretty uncomfortable.
One should never underestimate a strong, mighty, youth with great talent and deep family roots.
As for the feelings of upset and the pain of defeat, he wasn't feeling them quite as strong this time. Could losing to your brother-in-law really count as a defeat? This was just a tactical victory!