Coroner Audrey Jamieson's investigation into the 24-year-old's death found 26 other international students also killed themselves between 2009 and 2015 - although that number is likely to be an underestimate.
The Coroners Prevention Unit compared the circumstances of the 27 international student suicides with a cohort of suicides among Australian-born students and found there was a lower number of diagnosed mental illness in those born overseas.
It also found only 22 per cent of those international students saw someone about their mental health within the six weeks of their death.
In contrast, 57 per cent of Australian-born students sought help in the same period.
Ms Jamieson found that despite the absence of a suicide note, Mr Liu exhibited signs of undiagnosed and untreated mental ill-health after relocating to Australia to study in November 2015.
She ruled his death as suicide.
She recommended the Department of Education and Training work with Victorian education providers to identify strategies to help vulnerable international students seek mental health support.
She also called for the national code for international students be changed to include a requirement that universities and TAFE's alert the coroner to any deaths of international students.
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