A friendship formed between individuals regardless of their social status or wealth, emphasizing a bond that transcends differences.
小明和小红虽然家庭背景差异很大，但他们却是真正的杵臼之交，友情深厚。
Although Xiao Ming and Xiao Hong come from very different family backgrounds, they share a genuine friendship that transcends social status, a truly deep bond.
Era:
Ancient
Frequency:
Synonym:
Story:
During the Eastern Han Dynasty, Gongsha Mu, a scholar from Jiaodong, Shandong, lived in seclusion in Donglai Mountain to pursue his studies.
To fund his education, he wore coarse clothes and worked as a rice-pounding laborer at the residence of Official Wu in Chenliu Commandery.
Official Wu, noticing Gongsha Mu's extraordinary demeanor and conversation, befriended him and even sponsored his continued studies.
Later, Gongsha Mu completed his education and became an accomplished and upright official.
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