He Just Became a Garrison Soldier and Was Kidnapped by the Barbarian Queen.

Qin Xiao, a graduate student in the Department of History, traveled to the most dangerous northern border of the Daqian Dynasty and became a garrison who could die at any time. He awakened to the "get something for nothing" system, where he could increase his cultivation and obtain god-level rewards by being lazy, sleeping, and taking the blame. In order to save his life and become stronger, Qin Xiao pretended to be dead on the battlefield, but accidentally tripped the enemy general; while sleeping during patrol, his snoring frightened off the enemy's night attack troops; in order to make a living, he surrendered to the enemy camp, but was regarded by the barbarian queen as a reclusive master of military skills, and was taken back to the tribe to get married. As Qin Xiao's "fishing" level gets higher and higher, his strength becomes more and more terrifying. Emperor Daqian begged him to return to the court as regent, the barbarian queen wanted him to rule the world, but Qin Xiao just wanted to find a place where no one would disturb him and take a nap comfortably. The whole book is full of laughter due to the huge contrast between the protagonist "wanting to lie down" and the outside world "imagining that he is working hard".