From Idler to Tech Tycoon: Earth - Chapter 91: Research

The king of assassins was reborn, mastering both alchemy and poison. Sitting inside the space, there was a ghost that loved crying.

Traveling through different worlds – this is unscientific!

Get cheats – it’s science!

…

This is a simple story. An ordinary person lives in a different world, farming and raising flowers, studying unscientific science in his free time.

until the end.

- Description from novelbuddy

After annihilating Han, Zhao and Wei empires in succession, the dynasty of Qin is ushering in an unprecedented flourishing age with powerful cultivators emerging endlessly. People take pride in being part of the Qin dynasty. However, Ding Ning, a young lad of humble origin in Changling, Qin, is determined to subvert this dynasty and kill the emperor who breaks in the Eighth Realm.

- Description from Novelupdates

Bibi Dong, once the powerful Supreme Pontiff, never expected to be reborn—especially not as someone else's martial spirit. In this new life, she finds herself bound to a young soul master with great potential but little knowledge of the powerful spirit within him.As Bibi Dong guides her host, she must confront her past mistakes and figure out why she was given this second chance. Is it to correct her past, or is there something more at play?