Jun Lin, a Chinese citizen, was studying at Montreal's Concordia University. (Facebook)

The murder of international student Jun Lin in Montreal, and the subsequent investigation into his grisly death, have drawn a host of comments from concerned observers on Chinese-Canadian websites.

Here is one example of what users have been saying since Monday on the website iask.ca:

• “What can extradition bring to the victim’s family? Canada doesn’t have death penalty. The most they can do is to put the murderer in their 'Federal prison of Holiday Inn!'”

Many commenters have called for justice in the case, as on 51.ca, a popular chat site with users in Canada and mainland China:

• “Wish he could be extradited to China.”
• “Pray for Lin’s soul to be rested in peace in that world. You were so perfect to our world.”
• “To Jun: you left the world in such a brutal and shocking way. Buddha tells us that we all came to the world with sins. Wish you still keep praying and believing what you had believed in in heaven.”
• “Extradition is just a matter of time, but western countries are really the Haven of Crimes”

Several commenters on comefromchina.com, a chat forum for Chinese people in the Ottawa region, praised Lin's character and described his death as a tragedy:

• “The murderer MUST be severely punished.”
• “The real problem will come when the trial starts. If the medical report says he is mentally ill, then there will be no justice expected.”
• “If the murderer is also confirmed on the involvements of the murder case in U.S., then justice would be better served in the U.S. if the Americans decided to get him extradited there.”
• “To be accepted for Computer Science by Wuhan University is not easy at all in China, Jun was surely a top student and excellent young man. What a great pity! (that we lost him)”
• “I heard that before he went to Canada, he brought his whole family to Beijing for sightseeing. He was a great pride for his family. Sigh...”