Gojoseon was the oldest dynasty in East Asia.

This dynasty lasted for centuries.

I am interested in East Asian culture.

This is the oldest book I have.

Gojoseon is considered the first state in East Asia.

This rock contains feldspar.

He is the tallest in the team.

The color of the sea changes due to the tide.

He read the record of investigation in detail.

He used the air conditioner remote to regulate the room temperature.