COTE : There is Something Wrong With Hikigaya - Chapter 142: No Pain, No Gain

Zong Shou is a player of the historical VRMMORPG “God Emperor,” and him being one of the “Seven Emperors” within the game.

For unknown reasons, Zong Shou finds himself transmigrated into the past, a period just before the “God Emperor” game history started! Possessing the weak body of a monster princeling in the process.

Zong Shou adventure describes his struggles to stay afloat in a merciless environment, and rising up despite all adversities, of course, surrounded by beauties along the way.

- Description from Novelupdates

A scientific genius named Thomas Harrier was transmigrated to an imperial prince body after a car accident that took his life. He found out that he is in a world similar to our own with a timeline akin to early twentieth century. The body that he is occupying was the imperial prince of a failing empire who suddenly rose to power after a successful assassination attempt of his father. Unaware that the attack is just the beginning of what is to come. He faces many challenges throughout. Will Thomas Harrier be able to live his second life in peace while running an empire and getting it back to its former glory? Or will he succumb into a conspiracy lurking within the country's borders?

Expect some:

Cold war era techs.

Super battleship with advanced electronics, propulsion, and fire control systems?
Helicopters?
Missiles?
Modern medicines and equipment?
AC-130?
A nuke?
Challenger or Abrams or Leopard?
F-4 Phantom or MIG-21?
Colored TV's.

Everything!!!

PS. Cover not mine, I just found it on google.

When a gas tank exploded, Jian Qingqing transmigrated into the body of a little girl who had just died of starvation. Looking at the skinny, starving family living in a worn-down house that did little to shield them from the rainstorm outside, Jian Qingqing felt that she would soon die again. But she hadn’t expected her kitchen to follow her through time. Looking at the abundance of supplies in it, Jian Qingqing’s eyes lit up. Great! She wasn’t going to die this time!

Using the supplies in the kitchen, Jian Qingqing led her family as they opened up the land for farming and building houses. Unexpectedly, the high-yield grains led the entire country out of poverty. Everyone praised Miss Jian as a God that had descended to earth! She developed a method to process coarse salt into fine salt so that people could eat it with ease. The Emperor’s face was filled with tears as he said, “Miss Jian is really my lucky star!”

In the end, the whole world was unified and shouted, “All of this is due to Miss Jian’s hard work!”

Jian Qingqing said, “I just like to grow crops. I didn’t do anything!”

After her success, Jian Qingqing planned to find a nice, obedient husband to bring home. But what was up with the legendary prince who was ruthless, indifferent, and could stop children from crying? Why was he always appearing beside her?

Ming Zhiyan said, “I’m nice and obedient. Why don’t you marry me, Qingqing?”

Looking at the man who was clearly a wolf pretending to be an obedient dog, Jian Qingqing fell into deep thought.

Elliot Hawthorne, had transmigrated into the body of a struggling apprentice mage, and now had one simple goal, summon a small, harmless spirit to pass his magic academy’s final exam. But thanks to a mistranslation in an ancient grimoire, he instead summons Azrael, the almighty Demon King.That would’ve been bad enough…. but then the spell accidentally binds them in an unbreakable marriage contract.Now, Elliot is stuck with a possessive, dangerously powerful, and ridiculously affectionate demon husband who:Carries him everywhere because “His cute little summoner’s feet shouldn’t touch the ground.”Summons hellfire just to keep Elliot warm when he complains about the cold.Declares war on any kingdom that dares to call Elliot “single.”Refuses to be unsummoned.“Why would I leave? My husband is here.”Worse, every holy knight, exorcist, and jealous god now wants Elliot dead for “stealing” the most powerful demon in existence.. Stuck with a one-in-a-million system dungeon and a devilish Demon husband, Elliott's life is constantly on the brink of disaster...But when Elliot starts uncovering secrets about the contract, he realizes…Did I really summon him by accident? Or… was Azrael waiting for me all along?One way or another, Elliott’s unlucky life becomes worse. An impending doom threatens the existence of the human and mortal worlds.And as if that wasn’t enough, he’s also stuck with a Demon for a husband.But maybe, just maybe… being bound to a dangerously powerful Demon King isn’t the worst fate after all.