Is beer a joke about wine?

The dialogue between the police and Ren Lei is as follows:

Policeman: Have you been drinking?

Ren Lei: No!

Policeman: Why does it smell of alcohol?

Ren Lei: I had a beer.

Policeman: Beer is also wine!

Ren Lei: Excuse me, is a snail a cow?

Policeman: No.

Ren Lei: Is soy sauce oil?

Policeman: No.

Ren Lei: Is that girl a mother?

Policeman: No.

Ren Lei: Is beer wine?

Policeman: No.

Ren Lei: That's it.

Thunder man:

Is the lathe a bed?

Is the waterfall made of cloth?

Is mercury silver?

Is dry ice ice ice?

Is soda ash alkaline?

Are whales fish?

Is it graphite ink?

Is it cement mud?

Are dinosaurs dragons?

Is rhinoceros a cow?

Is onion an onion?

Are Japanese Japanese?