When the court tries the cases involving dual nationality,the examination of the nationality status of the parties or other participants has two ways:direct examination and inci-dental examination.The purpose of the examination is to determine whether the court has juris-diction,whether the subject of the litigation is qualified,whether it meets the conditions for pros-ecution,whether it has corresponding substantive rights,and whether it is necessary to apply for-eign laws.The court's review of dual nationality should be legitimate and legal,while maintain-ing proper respect to administrative organs.In view of the problems of judicial review,such as different verdicts in the same case,different verdicts in different types of cases,and insufficient reasoning,we can continue to optimize the review path of dual nationality by strengthening active justice,issuing judicial interpretations,publishing guiding cases,and building smart courts,etc.