I used an optical microscope for an experiment at school.

When I look into her eyes, it's like I can see her heart. That's because the eyes are the window to the soul.

He was born and raised in South Hamgyong.

He was born and raised in North Hamgyong.

The Yata no Kagami is a sacred mirror that appears in Japanese mythology.

He wrote a message using mirror writing.

There is a state-of-the-art electron microscope in my laboratory.

We should always remember the power of Kannon in difficult times.

He said, 'It's difficult to make a life,' explaining the phrase 'When a man steps over the threshold, he has seven enemies.'

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.