Prodigiously Amazing Weaponsmith - Chapter 4982 - : Sacred Phoenix Race’s son-in-law

The Empress who dies in torture, An Rushuang is her name. After she wakes up, she finds herself has time-travelled to when she was twelve years old, but she would turn into Major General’s white horse at night. He is a general who orders about the winds and clouds on the battlefield, and she is a little girl lives in her boudoir seclusively.
She endeavors to change her fate, and he spared no effort to win every battle. They meet each other every day, well, it’s night to be accurate. Is that a dream or not? She pleads to marry the seignior to win peace for her family, only to find he is the one she is going to marry.
“Growing old with you under the same roof is my long-cherished wish”, thought them both.

- Description from Novelupdates

Effort?Effort my ass!People born to be beasts of burden could never touch the lower limits of those chosen by the heavens no matter how hard they tried.Talent gap, background gap, appearance gap, luck gap...A single disparity could swallow all the struggles of the beasts of burden, and a combination of many made their lives unbearably tragic.Su Huai was filled with indignation over this.As a result, rebirth + system, fortune arrived suddenly.The chosen by the heavens? Kneel down, all of you.Let the dogs engage in romance; I just want to explode with rewards.

Long Fei, a cross-timer and doujin, is an otaku who traveled to another world. In the original world, he was an otaku fan of Gundam and military science fiction.

He died in an accident and was reincarnated into another world. The Gundam works he had read before his death and the techniques in various military novels could be brought to another world.

How would he use the Gundam that Long Fei created? What waves can be caused in this different world?