To formally acknowledge and pay respect to each other's mothers, symbolizing the formation of a deep, familial bond or sworn brotherhood/sisterhood between two individuals or families.
他们情投意合，决定升堂拜母，成为异姓兄弟，以后相互扶持。
Sharing a deep understanding, they decided to formally acknowledge each other's mothers, becoming sworn brothers who would support each other from then on.
Era:
Ancient
Frequency:
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