Group 1 - The article provides a step-by-step guide on how to maintain project information in the electronic tax system, specifically focusing on "prepaid card sales" [2] - It details the process of entering project names and selecting the appropriate tax classification codes, highlighting that the tax policy for prepaid card sales is "non-taxable" [2] - The article also explains the procedure for issuing blue invoices, including the selection of invoice types and the necessary details to be filled in [3] Group 2 - The article mentions the total invoice quota for the current month is 265,075.47 yuan, with no invoices issued yet [3] - It notes that the cumulative tax amount for blue invoices is 28.30 yuan, and one red invoice has been issued [3] - The source of the article is identified as "Shanxi Taxation Tax Promotion Express" [5]