He is an important character.

He ate three apples.

He ate three apples.

He ate three apples.

He warned the young people, saying 'At thirty, one should not be careless, at forty, one should not be indecisive.'

He defeated the enemy using the Thirty-Six Stratagems.

The thirty-first day is my birthday.

We have our wedding on the twenty-third day of the month.

I went to see a movie by myself.

Watching a movie alone is enjoyable.