Measures of People's Republic of China (PRC) Municipality on Invoice Management
Article 7
The special VAT invoice is printed by the enterprise determined by the competent tax department of 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. Article 10
Invoices shall be overprinted with a unified national invoice producer seal. The style of the national unified invoice producer seal and the requirements for invoice layout printing shall be stipulated by the competent tax department of the State Council. The invoice producer seal shall be made by the tax authorities of provinces, autonomous regions and municipalities directly under the Central Government. It is forbidden to forge the seal of invoice producer.
Invoices should be changed irregularly.