VAT invoices can actually be divided into ordinary VAT invoices and special VAT invoices. According to your order, the invoiced items belong to self-produced agricultural products, contraceptives, ancient books and imported instruments and equipment directly used for scientific research, scientific experiments and teaching, and can be exempted from VAT.
What is the reason for tax exemption?
Tax-free invoices are generally used for laid-off, disabled and unemployed people engaged in catering services, and enjoy preferential national tax-free policies. The tax authorities shall provide them with tax-free invoices.