老蚌生珠

1. • lit. an old oyster producing a pearl (idiom)
2. • fig. birthing a son at an advanced age

Character by character

• 老(lǎo)prefix used before the surname of a person or a numeral indicating the order of birth of the children in a family or to indicate affection or familiarity
• 蚌(bàng)mussel
• 生(shēng)grow
• 珠(zhū)bead