People take a moment of silence during the National Day of Mourning event in Vancouver, British Columbia, Canada, on April 28, 2022. The National Day of Mourning is marked annually in Canada on April 28 to commemorates people who have lost their lives, suffered injury or illness on the job, or experienced a work-related tragedy, and also to raise awareness of health and safety in the workplace. Photo:Xinhua

People take a moment of silence during the National Day of Mourning event in Vancouver, British Columbia, Canada, on April 28, 2022. The National Day of Mourning is marked annually in Canada on April 28 to commemorates people who have lost their lives, suffered injury or illness on the job, or experienced a work-related tragedy, and also to raise awareness of health and safety in the workplace. Photo:Xinhua

People take a moment of silence during the National Day of Mourning event in Vancouver, British Columbia, Canada, on April 28, 2022. The National Day of Mourning is marked annually in Canada on April 28 to commemorates people who have lost their lives, suffered injury or illness on the job, or experienced a work-related tragedy, and also to raise awareness of health and safety in the workplace. Photo:Xinhua

A girl lays a flower during the National Day of Mourning event in Vancouver, British Columbia, Canada, on April 28, 2022. Photo:Xinhua