Depression. It was a type of mental disorder, and Zhang Hei and Jun had definitely heard of it before. Even the news broadcast on television or uploaded on social media often reported accidents of people who ended up committing suicide due to depression, and that was probably why they were so shocked to hear the information from the doctor.
The doctor did say that they would need a specialist to do further examinations on Fu Wei Long after this, but the doctor's hypothesis was already quite shocking to both Zhang Hei and Jun.
When they were silent, the doctor then said that Fu Wei Long was currently still unconscious, but he would be transferred to the ward for further treatment. Zhang Hei nodded his head stiffly in response to what the doctor said, and the two of them also followed quietly as Fu Wei Long was transferred to the ward.