What category of invoice for pure water supplies

VAT general invoice category. Invoice refers to all units and individuals in the purchase and sale of goods, provide or receive services and engage in other business activities, issued and collected business vouchers, pure water supplies invoicing category is the category of ordinary invoices of value-added tax, because it is after the relevant departments, it is the original basis for accounting, but also audit organs, tax authorities, law enforcement inspection of the important basis.