City of Sin (Yanyu Jiangnan) - Vol 9 Chapter 135

He is the ruler of the mercenary realm, an overlord that gives headaches to the leaders of any country! For the sake of his friends, he’s willing to sacrifice himself; for the sake of his family, he does not hesitate to spill blood! He is a dragon, one that soars above even the highest of heavens. He’s a power that advances triumphantly through unstable situations, stirring up both the winds and the waters.

- Description from Novelupdates

Finn travels to the timeline after Avengers: Endgame and obtains a system that hides one's own strength while allowing him to grow even stronger!However, he soon discovers that the system's prescribed hiding place is actually Westview!Before long, Wanda will seize control of the entire town, plunging countless people into pain and torment.Fearing exposure and determined not to give up halfway...Finn decides to act first—conquer Wanda and resolve the issue at its root.And thus, he embarks on a road of no return.Here's the cliched NOTE : English is my 3rd language so I'm not proficient in that , so if there are any mistakes please point it out to me

Chang An, capital of Tang, the most powerful empire in the continent. A heaven wrecking massacre shook the city to its core. Amidst the incident, a young boy named Ning Que managed to get away, dug out from a pile of corpses along with a little girl called Sang Sang. Years passed, and since that day the two of them lived together. Together with Sang Sang they both entered the military, with plausible military achievements, they were recommended into the Scholar School, which began their miraculous journey.

Who says I am a worthless student, the pretty Alliance Leader is within my grasp.

Who says I am a single man, a harem of huge numbers waits upon me.

Watch how the strongest senior high school student in history, Li Fan, turns over the city upside down, becoming a hero unparalleled under the heavens!

My wife is the martial alliance leader, and I am the strongest senior high school student, Li Fan! I’m waiting for all of you to drop in to discuss the rules of Jianghu!

- Description from Novelupdates