Père David's deer, also known as the 'four unlike', is a species of deer native to China and is listed as an endangered species.

My new car is a four-wheel drive.

He likes to speak using four-character idiomatic compounds.

The Quaternary is the most recent era in Earth's history.

He drew a tetradecagon shape.

My room is twenty-four square meters.

He achieved a four concealed triples in mahjong.

These Four Heavenly Kings are his most trusted subordinates.

My father is forty-one years old.

It is thirty-four kilometers to my house.