台Taivo A Taiwan Mandarin dictionary

五百年前是一家

wǔbǎiniánqiánshìyījiā

ㄨˇ ㄅㄞˇ ㄋㄧㄢˊ ㄑㄧㄢˊ ㄕˋ ㄧㄐㄧㄚ

1five hundred years ago we were the same family (saying) (said of persons with the same surname)

Example

五百年前是一家。

wǔbǎiniánqiánshìyìjiā

Five hundred years ago it was a house.

Keep 五百年前是一家 and it comes back until you know it.