Different types of invoices have different validity periods. The special VAT invoice is valid for 180 days, and the ordinary invoice is valid for 6 months. Article 3 of the Measures for the Administration of Invoices in People's Republic of China (PRC) stipulates that the term "invoice" as mentioned in these Measures refers to receipts issued and collected in the purchase and sale of commodities, provision or acceptance of services and other business activities. Article 7 stipulates that special invoices for value-added tax shall be printed by enterprises determined by the competent tax authorities in the State Council; Other invoices shall be printed by enterprises determined by the tax authorities of provinces, autonomous regions and municipalities directly under the Central Government in accordance with the provisions of the competent tax authorities of the State Council. It is forbidden to print, forge or alter invoices without permission. Measures for the Administration of Invoices in People's Republic of China (PRC) Article 3 The term "invoice" as mentioned in these Measures refers to receipts and payments issued and collected in the process of buying and selling commodities, providing or receiving services and engaging in other business activities. "Measures for the Administration of Invoices in People's Republic of China (PRC)" Article 7 Special VAT invoices shall be printed by enterprises determined by the competent tax authorities in the State Council; Other invoices shall be printed by enterprises determined by the tax authorities of provinces, autonomous regions and municipalities directly under the Central Government in accordance with the provisions of the competent tax authorities of the State Council. It is forbidden to print, forge or alter invoices without permission.