《Detective Di RenJie prequel》Ep4:Episode 4
Shai Zi was originally a murderous Jiang Yang thief, and later was involved in the case Di Di served, then Fanran wash up the basin, willing to follow the Di Gong dogs horse effectiveness. Because he is particularly familiar with rivers and lakes, but also superb martial arts skills, investigation and detection of the case is very helpful, so Di RenJie no matter where the prosecution are willing to take him. Shai Zi is indeed superb skills, just as Di Gong hurriedly hurriedly pass through Liulin Town, he told Di Gong by Superman's observation that they had been followed.