On legitimacy of the methods of private investigation for intellectual property Research on the private international law of intellectual property 并列题名：Research on the private international law of intellectual property Legal questions in the valuation of intellectual property New theory of biodiversity protection of intellectual property Research on crimes of infringing rights of intellectual property Research on the protection of intellectual property Analysis of the new and difficult problems in the administration of intellectual property Analysis of the new and difficult problems in the adminlstration of intellectual property