Ning Cheng's heart sank, not at all surprised that Duan Qiantai agreed to his conditions. He knew that he had been fooled. Duan Qiantai definitely had more than fifty spiritual veins. Based on his understanding of Duan Qiantai, Duan Qiantai has less than fifty starry sky spiritual veins, and he will not make a promise to exchange twenty starry sky vitality spiritual veins....