Saturday night is a time when most university students take a break from the rigours of study. It's a time to swap textbooks and lectures for a night of socialising with friends.
Last weekend, a carefree night out was a world away from the dormitory room of Ge Weiwei, a mainland PhD student at the Hong Kong University of Science and Technology.
At 7pm last Saturday a security guard found the student from Suzhou, in Jiangsu province, dead in his bedroom. Ge, 27, who had recently suffered depression and received counselling, had hanged himself.
His death has again cast light on the dark, inner troubles some students struggle to overcome. Although HKUST experienced a similar tragedy in 2004 when another mainland PhD candidate leapt to his death from a campus building, the university's students are not alone in coping with mental illness.
Psychologists say depression is more common among university students than is often acknowledged and mainland students such as Ge may suffer additional pressures.
Every day, an average of three people commit suicide in Hong Kong. Disturbingly, it is the leading cause of death for those aged 15 to 24. Recent years have seen a number of student suicides involving young people of all ages. One of the most shocking came in May when an 11-year-old boy jumped to his death.