I'm a centenarian veteran, and the conscription has come to me?

What is it like to be drafted into the army at the age of 100?
In the 78th year of the alien invasion, a strange change occurred on the battlefield of the Sixth Channel, and all soldiers under the age of 70 died inexplicably.
The federal government called up elderly veterans to return to the battlefield.
Wang Fei: "I never thought that I would be called up to the battlefield at the age of 100."
Wang Fei: "I never expected that at the age of 100, after an ordinary life, the system would awaken!"