The piece of jade used in ancient China, known as 'bi', is considered to be very valuable.

This building is surrounded by firewalls.

Hexane is a compound often used in organic chemistry.

They are referred to as a pair of matchless things at school.

He hung a picture on the eastern wall.

I live in Shenzhen.

Asami is my best friend.

He has a beneficent heart.

He is a very careful person.

The late autumn wind is rustling the leaves of the trees.