shēn dù shuì mián

having a deep sleep

The Chinese term '深度睡眠' refers to the stage of sleep in which the body is in a state of rest and recovery. It is characterized by slower brain waves and less responsiveness to external stimuli. This phase is important for physical and mental health and is often associated with restorative processes in the body. In everyday conversation, this term may be used to describe a state of being well-rested after a good night's sleep.