There is no question of applying for judicial expertise in criminal second instance. If the parties think that the judgment of first instance lacks necessary judicial expertise, they can directly point out the special issues that should be identified and the facts of the case that can be proved in the appeal documents. If the parties think that the expert opinion on which the judgment of the first instance is based is wrong, they can point out the mistake in the appeal and ask the second instance not to adopt the expert opinion.
In the civil second instance, if the parties put forward an application for appraisal in the first instance, but the judge did not adopt it, it can be used as one of the reasons for appeal in the appeal document, pointing out the special problems that should be appraised and the facts of the case that can be proved; If the parties think that the expert opinion on which the judgment of the first instance is based is wrong, they can point out the mistake in the appeal and ask the second instance not to adopt the expert opinion.
Under normal circumstances, when the second trial of a civil case can be held, it is necessary to apply for judicial expertise.