B will bear the burden of proof, and whoever advocates it will bear the burden of proof, not to mention the adverse consequences. If it is a favorable consequence of appraisal, it may be possible to ask the other party to compensate for the loss and bear the appraisal fee. Now there is no doubt that B will bear the burden himself. The reason for rejecting the prosecution is that the subject is unqualified, mainly due to procedural errors, which are not necessarily related to the appraisal results.