So what I finally understand is that the skills are like Excel macros - learning a skill is a shortcut to mold the energy to form a desired effect .
And now Weiqing is leaning the steps to manually create each effect.
As a result there is no need to keep stored a lot of macros-knowing what each macro/skill is supposed to do - Weiqing can manually manipulate his energy to follow the procedure and bring about those effects.
However there are some skills which can be compared to Naruto's Kekkei Genkai skills. There is no option other than learning those macros :P
However I may be totally incorrect :P
AnonyHuman