Immortal Tang: Conquer Half of the Country for Erfeng

Li Xiuning, a history teacher who died suddenly after staying up late at night, was taken to the hospital. When she was on the verge of death, she received a life countdown system. System: "You have two choices now. The first is to die directly in the hospital, and the second is to return to the early Tang Dynasty to complete the task I gave you and increase your life span. You choose." Nonsense! I don't want to give up treatment yet, survival is human instinct! Li Xiuning chose the second one without hesitation, successfully traveled to the late Sui Dynasty, became the sister of Li Shimin, the first emperor of the ages, and became the first Princess Pingyang Zhao in history to be buried with military honors. At this time, Li Yuan was transitioning from a civilian position to a military attache, and he was ambitious and wanted to marry Li Xiuning to Chai Shao. She knew the history well and knew that Li Yuan had been secretly cultivating power for a long time, waiting to rebel against the Sui Dynasty and proclaim himself emperor. But the first task of the system is to refuse to marry Chai Shao, otherwise the life countdown system will be liquidated immediately. In order to survive, she had to accept the first task assigned by the system, and successfully completed the task to increase her life span by one hundred days! Damn, this is inconsistent with historical facts. But it doesn't matter, living is the most important thing! What? Support Li Jiancheng openly, but support Li Erfeng secretly? This is repeated. . Forget about subduing Qin Qiong and Yuchi Jingde, but also want to rescue Emperor Sui Yang from Yu Wenhuaji? Do you still have to do the work of touching Colonel Jin for the system? . . . As the difficulty of different tasks increases, in order to survive in the world, Li Xiuning is determined to do something big in this era of competition among heroes!