if the company doesn't help with relevant resignation procedures or doesn't pay wages. Apply to the labor inspection department for arbitration, and remember to keep your manager's signature on the resignation application. This is strong evidence. The signature proves that he has received your application. Ha ha.
supplementary answer to the question:
that's his reason, so ignore it. It's okay to have the support of labor law.
the purpose of submitting a written application for resignation is to inform the company in advance, so that the employer has time to recruit people or arrange someone to take over your work, but to keep evidence that you have informed the company in advance in case of disputes in the future. You don't give lip service when you go to court.