Why do I feel so tired even though I just sit all day at work?

Everyone has probably experienced this moment at work:

Although I am on the verge of going crazy inside, I still appear to be graceful on the surface, as if nothing has happened.

For example, your boss requires you to keep your phone on 24 hours a day and reply to group messages immediately. You feel speechless inside, but can only reply “OK, got it” in the WeChat chat box. A customer suddenly makes an inexplicable request, and you know it is unreasonable, but you still have to work overtime to complete it. It is obviously a simple collaboration, but your colleagues have various reasons and refuse to cooperate...

These moments are defined as "emotional labor" by sociologist Stephen Hochschild in The Cultivation of the Mind.

Now, "emotional labor" has become the third type of labor in addition to physical labor and mental labor, and is even more exhausting than work itself. It consumes the happiness of "workers" day after day, making people lose their enthusiasm for work and life.

So, how should we take care of our emotions, make ourselves more comfortable, work more smoothly, and make our leaders more satisfied?