We usually regard Golden Wheel Monk and Zhang Wuji as high in martial arts but weak in fighting. Do you think that Cheng Kun from HSDS may deserve the honor to join the club? Consider the results of a few of his fights.
-in Ming Cult, he ambushed Yang Xiao, Wei Yixiao, and a few other Ming Cult members. He let off his guard and was injured by a greatly weakened Wei Yixiao.
-when fighting against Beggar Sect Leader Shi Huolong, who only mastered 12 of the 18 Dragon Palms due to insufficient kung fu talent, he was injured and vomitted some blood.
-when fighting against his student Xie Xun, he was not able to subdue Xie within 200 stances. Now, Xie Xun is probably on par with Yin Tianzheng, Yang Xiao, Wei Yixiao. 2 of those guys proved to be at best a tie with one of the Du generation monks. 1 of those guys should be no match for Du x. Cheng Kun was described to possess similar martial arts level as Du x. And yet, his combat performance seems weaker.
Overall, it seems that Cheng Kun is always performing less than optimum for his kung fu level.