After Yau Tan Tze learned the Yik Gun Ging/Yoga, he became an inner power dynamo (not unlike Cheung Mo Gei or Hui Juk, although definitely weaker than the latter). Still, also like the early Cheung Mo Gei or Hui Juk, Yau Tan Tze didn't have much in the way of actual fighting skills. Cheung Mo Gei was able to eventually overcome this by mastering the Keen Kwun Dai Loi Yee (enabling to crib the skills of the masters he went up against) and receiving a few months' of instruction from Cheung 3 Fung, and Hui Juk eventually learned up actual martial arts fighting skills from the manuals left at Ling Jau Palace. I don't think Yau Tan Tze had any similar resources for learning any actual fighting techniques, however (he certainly didn't learn much from his father and uncle when they were still alive). Nevertheless, Yau Tan Tze was able to put up a pretty good fight against Kiu Fung at the Shaolin Temple. To do that, he would need at least some fighting skill to go with his tremendous inner power. Where did he get it from?