People view the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain, on Nov. 7, 2018. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I. (Photos: Xinhua/Han Yan)

Photo taken on Nov. 7, 2018 shows the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I.

Photo taken on Nov. 7, 2018 shows the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I.

People view the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain, on Nov. 7, 2018. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I.

Photo taken on Nov. 7, 2018 shows the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I.

Photo taken on Nov. 7, 2018 shows the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I.

People view the installation called "Beyond the Deepening Shadow: The Tower Remembers" at the Tower of London in London, Britain, on Nov. 7, 2018. This installation is part of a nationwide series of events to commemorate the 100th anniversary of the end of World War I.