You can't. As Christians, we should abide by the principle of honesty and trustworthiness and keep honesty and integrity in our personal life and business activities. Therefore, Christians should abide by national laws and regulations, and should not use commercial activities such as invoices to seek improper benefits, not to mention deliberately falsely reporting the invoice amount for reimbursement. This is not only immoral, but also illegal. As a man of faith, he should pay attention to moral and legal norms in business activities, and must not violate the principles of justice and conscience, and sincerely and honestly treat his actions and choices.