Service flow processing method

A traffic flow processing method, comprising:

• sending, by an application function (AF) network element, a traffic flow steering policy request to a network exposure function (NEF);
• wherein the traffic flow steering policy request is configured to provide traffic flow steering policy information;
• sending, by the NEF, a data storage request to a unified data repository (UDR), wherein the data storage request is configured for requesting to store the traffic flow steering policy information in the UDR, wherein the UDR storing the traffic flow steering policy information comprises one or more operations of adding, deleting, and modifying;
• sending, by the UDR, a data storage response to the NEF, wherein the data storage response is configured to indicate that the traffic flow steering policy information is stored in the UDR network element;
• sending, by the NEF, a traffic flow steering policy response to the AF, wherein the traffic flow steering policy response comprises an application identifier corresponding to the traffic flow steering policy information, and the application identifier is configured for determining to store the traffic flow steering policy information in the UDR.