He faltered due to nervousness.

I have been to Zhangjiakou.

We will never know if he told the truth, because dead men tell no tales.

His words reminded me of the proverb 'good advice may be uncomfortable to hear.'

The urban legend of the slit-mouthed woman terrifies children.

By training the orbicularis oris muscle, your expressions become more expressive.

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

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.