Great Tang: After a Showdown at Xuanwu Gate, I Found a New Tang Dynasty

After transmigrating to the Tang dynasty, Li Chengxuan became the posthumous son of the former Crown Prince Li Jiancheng. He was left to wander homeless and starve, while Li Shimin hunted him down every day. His life was unbearably miserable. Fortunately, he awakened a System and obtained the Overlord's courage from the start, along with historical figures such as Zhang Liao, Yue Fei, Zhang Liang, and Shen Wansan, as well as tens of thousands of Beiwei troops... With these resources, Li Chengxuan destroyed the Turks, repelled Tibet, annexed Goguryeo, founded the Great Prosperity kingdom, and was granted the title of Heavenly Qaghan. Many years later. Li Chengxuan, with his army at the gates: "Li Shimin, there are some debts that must be repaid!"