Linghu Chung XXDF + shaolin Yijin Jing = complete XXDF? Ren Wo Xing XXDF seems to have unfathom potential because absorbing an opponents internal energy and useing it against them seems like a sure way win a bout. Added, that the rate of absorption can also speed up and cripple your opponent with shock, refering to the TV adaptions. Jin Yong put a cap to this overpower technique by giving it a draw back of conflicting internal energy, foriegn energy runs amuck inside the body, this can be dangerous mid fight and constrains the user from properly using the absorb energy. Ren Wo Xing used most of his internal to suppress his mix internal energy from running amuck. His suppression and the technique's drawback prevents him from using this technique to the full potential. Internal energy = +strength, endurance, stamina, speed according to Jin Yong novels and TV adpations. For someone like Ren Wo Xing with XXDF with XXDF with immense internal potential = immense strength, endurance, stamina, speed. He is limited by XXDF flaw.
However, Linghu Chung XXDF + shaolin Yijin Jing is not only unhibited by the flaw he may have surpassed Ren Wo Xing in effectively using XXDF or will surpass him in a couple years after the end of the story. So is Linghu Chong XXDF the complete version of XXDF.