京公网安备 11010802000104号京ICP备09113703号-1信息网络传播视听节目许可证: 0110553广播电视节目制作经营许可证公司名称：北京车之家信息技术有限公司 ...

Episode 8 of When the Phone Rings reveals subtle information about Sa-eon's history. It indicates that Sa-eon is the adopted son of Ui-yong and that Chairman Baek tried to kill the actual son.