Tax-free invoices are generally used for catering services engaged by laid-off, disabled and unemployed people and enjoy preferential tax policies of the state. The tax department provides them with tax-free invoices.

So consumers eat in such places, and operators can only pay tax-free invoices. At the same time, tax-free invoices do not participate in scratch and second lottery activities. Because the duty-free catering industry enjoys the preferential tax policies of the state, there is no tax revenue and no financial matching bonus source. Therefore, tax-free invoices do not participate in scratch-off and second lottery activities.