What invoice does the engineering material testing company issue?

Engineering materials testing companies can issue electronic or paper-based general VAT invoices, electronic or paper-based special VAT invoices and other invoices, and need to fill in the invoice items and other related information on the face of the invoice according to the business content that has happened. Among them, the VAT ordinary invoice is an ordinary invoice issued by the VAT taxpayer through the VAT tax control system when selling goods or providing taxable services and services. Special VAT invoice is an invoice issued by a VAT taxpayer for selling goods or providing taxable services, and it is a voucher for the buyer to pay VAT and deduct the input VAT in accordance with the relevant provisions of VAT.