Gu Tong is a medical student, somewhat familiar with the ailment of insomnia.
Insomnia has many causes, the most common being mental disorders, effects of medication, and brain nerve dysfunction—
Gong Chenli's situation is complicated, and Gu Tong finds it difficult to judge at first! However, based on a superficial understanding, she attributes it to a psychological issue.
"A reason?" Gong Chenli's eyes remain fixed, continuously gazing at the sky as if trying to take in all its scenes, and said: "I once lost a cat! Ever since it left, I've had insomnia!"
A cat...
Gu Tong's mouth twitched; she never would have guessed it was due to this reason...
"So you drink alcohol to help with sleep..."
Alcohol is known to aid sleep; this is common knowledge.
If Gu Tong observed correctly, Gong Chenli was drinking whiskey neat, without any mixing. Whiskey generally has an alcohol content between forty to sixty degrees.
