Goods sales, taxable services, transportation services, movable property leasing services, etc. Through the understanding of postal agency business, it is known that the items entrusted to the postal department to issue ordinary invoices include sales of goods, taxable services, transportation services, movable property rental services and so on. , and need to provide the original and photocopy of the identity certificate. Postal service is a business run by the state or directly engaged in delivering all kinds of mail (letters or articles), which has the characteristics of communicating politics, trade and people.