MTL - Metropolitan System - Chapter 16 Is this about?

Upon awakening, Zhou Sui finds himself a low-level Qi Refiner in the Cultivation World. Fortunately, he obtains the Supreme Gu God Bowl, which allows him to cultivate various Gu Insects.

Cultivating the Spring Autumn Gu can prolong his life and bestow immortality.

Cultivating the Golden Cicada Gu grants the ability to revive the dead and regenerate flesh and bone.

Cultivating the Dragon Elephant Gu gives him the Power of Dragon Elephant and the Dragon Elephant’s Body, making him invulnerable.

Yet, the first Gu Insect he cultivates happens to be the Obsession Gu.

From then on, he discovers a broad path of cultivation.

As time changes and landscapes shift, the only constants are my eternal life and the everlasting Zhou family.

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Since childhood Gu Wuji has regularly encountered ghosts and was one day involved in an infinite world of terror, just– I treated you as an evil spirit, why do you want to hug my thigh?

- Description from Novelupdates

There are always four kinds of people in the traditional Mary Sue world. The Male Lead, the Mary Sue female lead, the woman who never wanted to see the female protagonist live a good life, and the infatuated man willing to destroy heaven and earth to get the female lead.

The genius pharmacist transmigrated into a pitiful farm girl’s body. Ignored by her own father, abused by her stepmother, and bullied by her stepbrothers. Her “twin” brother was given to distant relative and she went as the “extra” to live under someone else’s roof.

Luckily she possessed mad apothecary skills. Collecting herbs, plowing herb fields, formulating medicines and treating the ills, she refused to live an ordinary life as she slowly uncovered the truth of her real identify.

Inadvertently, she saved a dashing man who was in reality a big, bad wolf hiding under the skin of an innocent little puppy. He pulled out all his tricks: I have no other means to return your favor of saving my life. What say I repay you by marrying you?

- Description from Novelupdates