Complex sentence: Police arrested one 14-year-old male for contempt of court during the clearance of Mong Kok and applied for a CPO, Four weeks later, the CPO was cancelled when the Department of Justice decided that they would not prosecute.
Split into simpler sentences: Police arrested one 14-year-old male for contempt of court during the clearance of Mong Kok and applied for a CPO. The CPO was cancelled four weeks later when the Department of Justice decided that they would not prosecute.