What is in this box?

He is a specialist in heart disease and is known as a heart doctor.

His plan collapsed like a collapse.

This silk was very expensive, and only the ancient royalty could wear it.

The beat of this song is very unique.

He did his best to seize the opportunity.

This is my new pen.

I am studying the Zhou dynasty school, Pan, in ancient China.

I sat by the sea and relaxed while listening to the sound of the waves.

He found a ceremonial libation cup used in ancient ceremonies.