Senses
老底子 background; pedigree
The truth about someone's past, private affairs, or family history; one's background, secrets, or ancestry
老底子 original staff
The original team or core group of people belonging to an organization.
老底子 inherited fortune
Wealth or fortune inherited from previous generations; ancestry or family pedigree.
老底子 old days
The past; old times; the way things used to be