Research on the court's functional investigation in criminal procedure Research on cross-examination in criminal procedure Research on the protection of property rights in criminal procedure Research on the case screening mechanism of criminal procedure 并列题名：Research on the protection of property rights in criminal procedure Research on the object of the criminal procedure Research on the objection system in criminal trial procedure Research on the prohibition of repeated suits in civil procedure Study on the jurisdiction system of criminal procedure 并列题名：Research on cross-examination in criminal procedure