The launch of intercontinental ballistic missiles has become an international issue.

There must be a reason why he is acting suspiciously. It's like the saying, 'Where there's smoke, there's fire.'

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.