1.1.3 Constitution of service value Value-in-use of services (1)to satisfy the spiritual or physical demands of human beings (2) the main part of social wealth (3)the material bearer to exchange value in the market economy1.1.3 Constitution of service value Value-in-use of services (1) to satisfy the spiritual or physical demands of human beings. (2) the main part of social wealth. (3) the material bearer to exchange value in the market economy