Invoicing, as long as there is a transaction, it is necessary to invoice. If you don't need it, you don't have to invoice. But if the tax department requires accounting, it must be done.

Work clothes are also commodities. If the other party asks for an invoice, it must be issued. And work clothes can be invoiced, unless you have no conditions to invoice, in which case it is illegal to operate without a license.

In a word, your business scope has been stipulated in the social credit code certificate issued before you sell your products, and it is ok to issue it according to the above business scope.