Mecha and Knife

Forge the unparalleled mecha with the heart of old age, and use the galaxy as a knife to smash the edge of the empire.
His name is Ji Xinghe. At the age of 65, he went to the Alien battlefield to avenge his son.
Lao Ji is fighting for a long time, aiming for a thousand miles, Lao Ji wears armor, and fights to the galaxy, Lao Ji drags a knife, not for glory.