The etymology comes from Li He's Song of Golden Tongxian in Tang Dynasty. The original text is as follows:

Maoling Liulang autumn wind guest, night smell dawn without a trace;

The osmanthus tree in the painting column hangs autumn fragrance, and the soil in the thirty-six palaces is green.

Wei Guan led the car thousands of miles, and the sour wind in Dongguan shot;

Empty sent John out of the palace door, thinking of your tears like lead water.

Declining orchid sends guests to Xianyang road, old and affectionate;

The lonely moon is bleak, and the acropolis is low.

If people die young, if they are sentimental, they will be old. This sentence has long been famous in ancient times, and many scholars regard it as the first half in order to make the second half. "People die young if they are affectionate" is right by today's people, which means ridicule. However, according to the principle of keeping in good health in TCM, affection will hurt the body, and affectionate people will inevitably die young because of affection. That's what this sentence means