The police can find out the information of Harrow Hitchhiker passengers, but it needs relevant evidence and procedures. According to China's laws, citizens' personal information and privacy are protected by law, and no unit or individual shall unlawfully obtain, use or disclose others' personal information. Therefore, if the police need to check the information of Harrow Shunfeng car passengers, they must follow the legal procedures, and need to provide the appropriate basis and supporting materials.