In fact, Zhao Hai already had a trace of the blood of kun Peng in his body. This blood was extracted by the space and put into Zhao Hai's body. However, Zhao Hai had never been able to use it completely because the blood of kun Peng was too powerful. Kun Peng was one of the most powerful divine beasts in the world. How could ordinary people withstand its blood? if it wasn't for the blood of kun Peng that was added into Zhao Hai's body by the space, Zhao Hai would have exploded and died.
The space was Zhao Hai's space, and everything was for his own good. Therefore, even if the space added the kun Peng bloodline into Zhao Hai's body, it would add some restrictions. In the beginning, Zhao Hai couldn't use the kun Peng bloodline at all. When Zhao Hai became stronger, they could slowly use the kun Peng bloodline.