Death March kara Hajimaru Isekai Kyusoukyoku (WN) - Book 15 - 15-23. The Forbidden Science

The six prefectures of Zhongbo were offered to foreign enemies on a silver platter, and Shen Zechuan was taken into custody in the capital, reduced to a drowning dog—loathed and condemned by all.Xiao Chiye followed the scent of the furor and made his way over. But instead of setting others on him, he kicked Shen Zechuan with his very own leg, rendering the latter an invalid. Who would expect this invalid to turn around and bite him in a counterattack until he was all drenched in blood?That was the start of an epic feud between both men who tore at each other every time they come face-to-face with one another.“Fate wants to bind me here for life, but this is not the path I choose. The yellow dust submerged my brothers deep under. I have no wish to bow in submission to an illusory fate. The imperial edict can’t save my troops, and the imperial court can’t fill the stomachs of my mounts. I’m no longer willing to lay down my life for this purpose. I want to surmount that mountain. I am going to fight for myself.”Note: A ‘drowning dog’ is someone who is down and out, having lost favor or power.

Offered as a bride to Hades at the age of eighteen.

Pestered by evil spirits in the day, and taken advantage of by a perverted demon at night.

Pervert: “Dear, a night with you is worth more than gold.”

I leaned away as I clenched my teeth angrily: “Worth my foot!”

- Description from Novelupdates

Bai Aoxue, the best mercenary in the 21st century, is accidentally sent back to the Chengxi Dynasty in Great Continent due to an explosion in her mission, and trapped in the first daughter of Prime Minister. After her rebirth, she is set up by her father to marry the 5th prince Jun Yeyan who wears a mask all day long.
In the face of bloodthirsty enemies, discord between brothers, collusion among courtiers and invasion of enemy state, can Bai and Jun resolve the crises? What will happen to their political marriage? How will the fierce battle for the throne end?
With many twists and turns, the book brings you to experience palace revolution, love and hatred thousands of years ago.

- Description from Novelupdates

[I traveled through time and entered the Taoist holy land Tianshi Mansion to practice. 】

Lei Jun: “This is a good start.”

[Late in getting started, late in practicing, mediocre in abilities, and slow in cultivation. 】

Lei Jun: “This is a bit bad.”

[Seeking good luck and avoiding bad luck, luck predicts the future, and choices determine life. 】

Lei Jun: “My golden finger is very powerful.”

[Top sign: …to get a fifth-grade opportunity, move secretly, and have no worries, good luck. 】

Lei Jun: “This is good, are there any others?”

[Lower sign: … Before you get any harvest, you will encounter a big disaster, you will be in a dangerous situation, and the casualties will be unpredictable. It is fierce. 】

Lei Jun: “Very good, I choose to sign.”

From now on, the benefits will not be lost, and the troubles will not come to you.

Life is in a simple mode, and you can watch others’ thrilling clouds rise and fall indifferently.

- Description from novelbuddy