Chương 6288: Focus on cultivation _3

Time passed by slowly. These days, Zhao Hai hardly stepped out of his house. He was cultivating with great effort. After obtaining the black stone iron rings, Zhao Hai's cultivation had become even more arduous. The process of integrating the refined iron Qi with his body was more difficult than that of ordinary people. This was because his body was already extremely strong. It was even more difficult for him to integrate the refined iron Qi with his body because his body was too strong. Therefore, he had to spend more time than others.