I Was a Gangster in the Tang Dynasty

Long Aotian, male, 28 years old, is the ace sniper of a certain special forces, codenamed "Viper". During a mission, he stepped on a landmine he had planted (yes, it was so outrageous) and when he woke up, he found himself lying outside Chang'an City in the third year of Zhenguan in the Tang Dynasty. There is no system, no golden fingers, only a body of muscles, a poisonous mouth, and the "useless" modern knowledge in the brain. When he shouted "Li Shimin, come out" at the gate of Chang'an City, the gears of fate began to turn - of course, in a strange direction. This is the story of a modern reckless man who relied on his skills to survive in the Tang Dynasty.