This long-time exposure photo shows the Christmas light projections at the Melbourne Town Hall in Melbourne, Australia, on Dec. 10, 2020. Melbourne's popular Christmas projections cover some significant sites including the State Library Victoria, the Melbourne Town Hall and Princes Bridge from Nov. 27, 2020 to Jan. 3, 2021. The projections at the State Library Victoria feature a thank-you tribute to heroes fighting against the COVID-19 pandemic in the city.Photo:Xinhua

This long-time exposure photo shows the Christmas light projections at the Flinders Street Railway Station in Melbourne, Australia, on Dec. 10, 2020. Melbourne's popular Christmas projections cover some significant sites including the State Library Victoria, the Melbourne Town Hall and Princes Bridge from Nov. 27, 2020 to Jan. 3, 2021. The projections at the State Library Victoria feature a thank-you tribute to heroes fighting against the COVID-19 pandemic in the city.Photo:Xinhua

Children view the Christmas light projections in Melbourne, Australia, on Dec. 10, 2020. Melbourne's popular Christmas projections cover some significant sites including the State Library Victoria, the Melbourne Town Hall and Princes Bridge from Nov. 27, 2020 to Jan. 3, 2021. The projections at the State Library Victoria feature a thank-you tribute to heroes fighting against the COVID-19 pandemic in the city.Photo:Xinhua

Heroes fighting against the COVID-19 pandemic pose for photo in front of the thank-you light projections at the State Library Victoria in Melbourne, Australia, on Dec. 10, 2020. Melbourne's popular Christmas projections cover some significant sites including the State Library Victoria, the Melbourne Town Hall and Princes Bridge from Nov. 27, 2020 to Jan. 3, 2021. The projections at the State Library Victoria feature a thank-you tribute to heroes fighting against the COVID-19 pandemic in the city.Photo:Xinhua

Children visit the Christmas light projections at the State Library Victoria in Melbourne, Australia, on Dec. 10, 2020. Melbourne's popular Christmas projections cover some significant sites including the State Library Victoria, the Melbourne Town Hall and Princes Bridge from Nov. 27, 2020 to Jan. 3, 2021. The projections at the State Library Victoria feature a thank-you tribute to heroes fighting against the COVID-19 pandemic in the city.Photo:Xinhua