The big ones can be divided into two types, the postal group and the Postal Savings Bank. Postal groups can be divided into postal business and postal savings according to their business. Postal services are mainly engaged in remittance, letters, parcels, express delivery, sales of pesticides, drinks, greeting cards and so on. The main business of postal savings is savings, that is, general deposit and withdrawal, transfer and other businesses. There are also agents selling insurance, funds and the like. Postal savings banks are divided by postal groups. ..