A massacre brought about by an immortal.

It allowed Yang Ping, an ordinary person, to recall his memories before the time travel and piece together the knowledge about technological development in his previous life.

In order to protect his family, he resolutely embarked on the path of developing technology, manufacturing mechas and fighting against immortals.

"Even if I can't cultivate immortality, I will use the power of technology to defeat the immortals—"

"Even if I can't become an immortal, I want to stand shoulder to shoulder with the gods with my mortal body—"

"Even if I can't become an immortal, today, I will drive a mecha and bring down the high and mighty immortal—"