How strong is Ye Chu's body power?

before entering the secret place, he was fighting with a six level hell nine head dog, and he also killed all of its heads. It was terrifying and absolutely amazing.

even if a strong player in the early stage of the fifth level attacks him with all his strength, he can't damage his body at all. On the contrary, he can easily kill the strong player in the fifth level with one hit.

when he and the breaking army are integrated, stark, the fifth level top power, is abused by him. Even though he has less power of cultivation, isn't there still the...