I don't know a thing about him.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

In order to maintain health, it is important to eat until you are eight parts (out of ten) full.

He is training his rectus abdominis muscle every day.

He said, 'An army marches on its stomach,' and ate a hearty breakfast.

He is the type of person who understands ten from hearing one.

If you train your external oblique muscles, your waist will become tighter.

The internal oblique muscle is a muscle that helps with the body's rotational movements and lateral bending.

They have a variety of opinions, making it difficult to agree.

His words are always sweet on the surface but venomous underneath.