"As harmonious as the spring breeze, as solemn as the autumn frost, taken from the image of money, round on the outside and square on the inside" comes from which book?

This is the motto Huang Yanpei wrote to his son. "It is based on money, which is round on the outside and square on the inside." Mr. Huang Yanpei warned his son to be "round on the outside and square on the inside", which means "Be principled in doing things, but have room for maneuver in dealing with others." ".

“As harmonious as the spring breeze, as solemn as the autumn frost; it is likened to money, round on the outside and square on the inside.” The “round” mentioned here generally refers to “flexibility”, not sleek or cunning. , but a kind of tact, generosity, accommodating, being kind to others, adapting to changes; "Fang" refers to the principle, which means square, upright, sharp-edged, upright, stable, and well-behaved. Refers to rigidity and conservativeness.

Extended information:

Huang Yanpei, a famous patriot and democratic educator in modern times, attached great importance to the education of his children.

In 1936, Huang Yanpei’s fourth son, Huang Daneng, was about to go to England to study. Before leaving, I slightly added and modified the motto I had adhered to throughout my life and left it in handwriting as a gift. This is Huang Yanpei's "32-character family motto": "Don't be idle when things are busy, and don't panic when things are complicated. Be true to your word, and be strong without desire. Peaceful like spring breeze, solemn like autumn frost. Taken from money, round on the outside and square on the inside." "32-character family motto" had a profound impact on future generations.

Reference: Baidu Encyclopedia-Huang Yanpei