Mother Qian spent 100 yuan on daily necessities in the supermarket. What function did RMB play at this time?

The concrete expression of the essence of money. With the development of commodity economy, it has gradually improved. In the developed commodity economy, it has five functions: value scale, circulation means, storage means, payment means and world currency. Among them, the most basic functions are value scale and circulation means.

The essence of money is universal equivalent.

The function of money refers to the function of money in economic life and the embodiment of the essence of money.

Coins have two functions since they came into being: value scale and circulation means.

The function of money to express and measure the value of all other commodities is called value scale.

The function of money as a medium of commodity exchange is called circulation means.

Coins not only have two basic functions: value scale and circulation means, but also have the functions of storage means, payment means and world currency.

What you said, RMB plays the role of value scale and circulation means.