A sincere friendship that disregards social status or wealth, emphasizing a humble and steadfast bond.
尽管他们后来一人经商有成，一人仍然过着朴素的生活，但他们的杵臼交情从未改变。
Even though one of them later became a successful businessman and the other continued to live a simple life, their sincere friendship, regardless of their different circumstances, never changed.
Next Idiom