Friends with a complete and profound mutual understanding, where there is no disagreement or opposition between them due to their deep emotional harmony.
他们相识多年，志同道合，早已成为一对莫逆之交
Having known each other for many years and sharing common aspirations, they have long become bosom friends with a deep mutual understanding.
Era:
Ancient
Frequency:
Antonym:
Story:
During the Warring States period, the philosopher Zhuangzi spoke of four friends, Zisi, Zixing, Zili, and Zilai. He said: "Who can take nothingness as the head, existence as the spine, death as the buttocks, and understand that life, death, survival, and extinction are all one, can become a friend?"
The four looked at each other and smiled, feeling a profound mutual understanding in their hearts, and thus became close friends.
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