shēngtángbàimǔ
to pay respects to a friend's mother
升堂拜母 shēngtángbàimǔ
- to pay respects to a friend's mother
- (idiom) to enter the inner hall to pay respects to a friend's mother; used to describe a very close friendship where two families are treated as one; originally used to describe the friendship between 周瑜 zhōuyú and 孙策 sūncè in the 三国志 sānguózhì