Biggest mistake
Old man Zhao was in a great panic. This was not what he wanted. He didn't want to anger this man at all. When old man Zhao heard about Sei being the world's most dangerous hacker called Monster, he decided not to ever mess with him. He knew right from that very time that Sei was more than just a dangerous being and his prediction was proven to be right years later. Who would have thought that the boy that his own pathetic and idiotic son disowned and even planned to kill would grow up to become so powerful that he could even hold the world in his hands?