Electronic general invoice purchasing unit to fill in the content includes: the name of the purchasing unit, the purchasing unit tax number, the purchasing unit address and telephone number, the purchasing unit account bank and bank account number, which: the unit name, the tax number is mandatory, the rest is optional (you can fill in the complete, or not fill in), in addition to the name of the provision of goods or services, the unit, the number, amount, tax and other related information are required.