Siheyuan: A Reborn Soldier King Takes Out Enemy Agents from the Start

War King Xiao Lin is reborn in a siheyuan and awakens a God-Tier Counterintelligence System from the start!

His coworkers think he's a useless gatekeeper, and his beastly neighbors take him for a fool. Little do they know that he can trace an entire spy network hidden in the steelworks back to a single screw!

Yi Zhonghai is a hypocrite?

Shoot him!

Qin Huairu is a fake innocent?

Arrest her!

The deaf old lady is the mastermind behind it all?

Take them all down!

In this era of fluttering red flags, where some betray, others stand guard.

I, Xiao Lin, code-named "Gatekeeper," will purge every enemy who dares invade, in the name of the nation!

This novel and its characters are entirely fictional. Any resemblance to real people or events is purely coincidental. Please do not imitate.