Legal analysis: investigating the company's behavior is an illegal act prohibited by law, and the evidence of investigation will not be recognized by law. The right to investigate and collect evidence is only authorized by the public, procuratorial and legal departments and lawyers according to law. According to the Supreme People's Court's explanation on the application of the Civil Procedure Law of People's Republic of China (PRC), evidence formed or obtained by methods that seriously infringe upon the legitimate rights and interests of others, violate the prohibitive provisions of the law or seriously violate public order and good customs shall not be used as the basis for determining the facts of a case.
Legal basis: Article 64 of the Civil Procedure Law of People's Republic of China (PRC), the parties have the responsibility to provide evidence of their own claims. The people's court shall investigate and collect evidence that the parties and their agents ad litem cannot collect on their own due to objective reasons, or evidence that the people's court considers necessary for hearing a case. The people's court shall comprehensively and objectively examine and verify the evidence in accordance with legal procedures.