MTL - Seventh Year of My Secret Love for You - Chapter 31

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.

“With each stroke, a river and a sea are painted, and with a brush, mountains and rivers are determined.Some people admire a painting depicting a fierce ox toppling a mountain and comprehend the profound martial art technique called 'Crushing Mountain Force.' With boundless strength, one can move mountains barehanded!Others gaze upon a sword shining with a cold moonlight in the painting, thus realizing the 'Cold Moon Divine Sword Art.' With this sword, they can slay otherworldly beings and gain fame that resounds in all directions.Li Changqing, a top woodcarver, transmigrates into the world of Cangyuan. He discovers that his woodcarvings are more enlightening than his paintings. From being a destitute and worthless painter, he rises to the pinnacle of the Cangyuan world.In his previous life, he indulged in sculpture and ended up raising a wayward child. However, in this world of Cangyuan, he has a well-behaved and filial son who lacks talent but dreams of becoming an immortal through cultivation.If my son wants to become an immortal, then as his father, I will help him achieve it!However, Li Hengsheng, the son, begins to suspect that his useless daydreaming and money-begging father may have been possessed by someone else!”

Luo Qing Chen is a wandering spirit that died thirty thousand years ago, roaming the Chaos Space

In order to not turn into dust, she is bound by an ice cold system to travel through time and space to complete missions.

Girls that pretend to be weak?  Slap them without explaining.

A silly cannon fodder?  Helping them amass treasures.

Meeting a real male god?  All of them will pamper.

System: Dear masters, what do I do if my host even dares bully the heavens?  Waiting for an answer, it’s urgent!

A certain male god: Change systems.

System: ヽ〔?Д?〕丿

- Description from Novelupdates

What would you do if your entire world were turned on its head? A Primordial System buzzing in everyone’s heads, displaying strange screens and other displays in their visions. Being thrown into a tutorial before entering your first System Event broadcast across the universe. Returning back to your home after the System Event to realize that it’s been filled with Gates leading to monster-filled domains, a good number of which have already broken and released their monsters into the world. And learning that the abilities every human being has – abilities that have led to the current structure of society – are nothing but the root of their Skill Trees. The very first skill in their Skill Tree out of many. Well, Ashley doesn’t know. She doesn’t remember anything other than some basic common knowledge from before waking up at the start of the tutorial with amnesia. So why should this change anything for her? Other than her finding out about the blood bestowed upon her by a certain primordial and her own Skill Tree. One with just a single skill. A skill to unlock the skill trees of those she kills. To assimilate. What to expect: Skill Trees, LitRPG Apocalypse, Skill Tree Assimilator(the ability to take the skill trees of those the MC kills that she can unlock through Skill Points without getting the skills right away), Livestreamed Dungeons, Livestreamed Public Battles and Events, Chaos Magic, Varied Magic due to Skill Tree Assimilator, and the MC does not start off strong in the start and only grows strong as she assimilates more skills from those she kills, the MC starts out without any memories and few emotions and slowly gains them throughout the series. What not to expect: I do not write romance(for the main protagonist), there will be no harem, there will be no reverse harem, and do not expect a really strong MC at the start of the story as she has to grow into that role.