The brain teaser in pass the parcel's short message in "Mao Cheating" is about the generational relationship. Finally, ask yourself what it is and what the brain teaser is.

Several years ago, you married a widow.

What about this widow? She has an adult daughter, so she is your daughter.

Later, as a daughter, you married your father and became your father's wife, which is your stepmother now.

Where's your dad? He is your son-in-law

Two years later, your wife gave birth to a son. He is your stepmother's half-brother.

Your son calls you dad, and you call your son uncle.

Later, you gave birth to a son for your father, which is your brother.

However, he must call you grandpa.

You are the husband of your daughter-in-law, and your daughter-in-law is the mother of your stepmother, that is, your grandmother.

Now the problem is coming. Excuse me, what are you?

A: You are your own grandfather.