He Ming is someone who can refine three golden keys, which signifies he has set exceptionally high standards for himself.
And through the previous failures of many strong individuals within the Evil Dragon Hall at refining golden keys, He Ming also summarized a certain rule.
The reason why more keys cannot be refined is purely because the martial artist's physical strength is insufficient.
For example, he could refine three keys because during the Star Emperor Stage, his physical strength had already reached the level of Dragon's Power.
Whereas those who could only refine one key, their physical strength was mostly not yet at the level of Dragon's Power.
Whether this idea is absolutely correct, He Ming does not know either.
However, all he can do is give his utmost effort to elevate himself.
