Lifeline means that ideological and political work plays a guiding, service and guarantee role in economic work and all other work. The so-called guiding role refers to guiding ideological and political work to the broad masses, so that the party's line, principles and policies can be implemented and all work can be kept in the right direction. The so-called service guarantee function means that ideological and political work must be carried out around economic work and all other work. Publicize and educate the masses with Marxism, arouse people's enthusiasm and creativity in building socialism, and ensure the completion of production tasks and other tasks. Guidance, service and guarantee are unified. Only by serving economic work and all other work can we give full play to its guiding and safeguarding role.