Douluo: Start Invincible From Capturing the Goddess - Chapter 21: Nana, you have to catch a good man quickly!

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.

Thirty-six [sequences] rule the world, and the creatures who hold the [sequences] can move mountains, cut rivers, cover the sun with one eye, and enter dreams for thousands of years.

There are heroic wine immortals who master the [Wine Sequence] and walk freely, there are court princes who understand the [Law Sequence] to formulate laws, there are [Tao Sequence] Taoist priests in the mountains, there are [Gu Sequence] wild Gu masters, there are [Gu Sequence] Love Sequence] the stunner and beauty.

Waking up from a dream, for Chen Yuyan, the rivers and lakes are no longer the rivers and lakes in the game “Strange Rivers and Lakes”, but the real world that is vividly presented before him.

In order to survive, in order to get rid of the gaze of the “fairy god”, Chen Yuyan had to step into the rivers and lakes, facing conspiracy, swords, swords and shadows, and ulterior motives.

- Description from novelbuddy

Yukima Azuma—charismatic, confident, and utterly unforgettable. He was the man every girl wanted but could never truly keep. One by one, they fell for him, only to be left with memories they couldn’t erase.Kasumigaoka Utaha: “I was his first, the one who taught him love… only for him to use it on other women.”Sawamura Eriri: “If I hadn’t been such a tsundere, maybe things would have been different.”Yukinoshita Yukino: “He was my light in the darkness, the only one who ever truly saw me.”Yukinoshita Haruno: “That bastard ran away after taking everything from me.”Hoshino Ai: “My only true love. The one I can never replace.”And when asked about their relationship with him?“Ex-girlfriend.”But to the women still in his life?Sora Ginko, Kato Megumi, Sagiri, Bocchi, Shinomiya Kaguya, Kirisu Mafuyu, Suou Yuki, Alya—“Thieving cats.”Because no matter how much time passed, no matter how far he went—one truth remained: Yukima Azuma was the one man they could never forget.