I Stole Dudou at the Beginning, Li Er Chased Me and Killed Me for Ten Streets

My name is Lin Xuan, I am a contemporary bastard and a part-time troll. I studied medicine and practiced Bajiquan with my grandfather. During one of my striding steps, a bird fell on my shoulder and broke my spine. Then my soul traveled to the ninth year of Wude in the Tang Dynasty. Three years later, I was bound to an outrageously deceptive system. The novice gift package gave me an epic difficulty task: "Sneak into the palace and obtain a secret treasure of Princess Changle" I thought it was the imperial seal, but the system navigation took me to the princess's boudoir. I thought it was a martial arts secret book, but its flashing arrow pointed accurately at the newly embroidered... Mandarin duck bellyband. With the "forced assistance" of the system, I succeeded and was successfully caught on the spot. The princess's scream resounded throughout the palace, and I became the most embarrassing assassin since the founding of the Tang Dynasty. In the sky jail, I received the task reward: [Physical Fitness Optimization] despite being called a "disciple". It feels like... I can kill a cow with one punch, but it doesn't seem to be of any use? Until, the furious Li Shimin personally came to chop me with his sword. I ran and he chased me. From the roots of the Imperial City to Xishikou, it takes ten streets!