In a martial arts sect like the Divine Sword Sect, there surely exist secret techniques similar to the Blood Burning Technique, perhaps even more advanced... But the problem is that he could not yet learn them.
These secret techniques all require a significant amount of contribution points to exchange.
He had once asked his master, Zhou Buping, hoping to be taught such secret techniques.
Zhou Buping told him not to worry about these for now... because to achieve the Perfect Body, one must absolutely not practice forbidden techniques that stimulate the body's potential.
Once a forbidden technique is used, any side effects would permanently prevent the achievement of the Perfect Innate.
Li Qian couldn't tell Zhou Buping that he had the aid of the Chen Bell and wasn't afraid of the side effects that came with forbidden techniques.
Anyway, he was idle and bored now. If he could improve on the Blood Burning Technique, it would benefit his martial arts cultivation.