Early Tang Dynasty: Li Er Was Raised and His Younger Brother Tian Khan

As we all know, the Tang Dynasty had two founding emperors. One is the elder brother and the other is the younger brother. ............ In the thirteenth year of the great cause, Li Jiancheng, the eldest son of Li, quietly became a person of later generations. From then on, the prosperous age flourished, the Sui Emperor was destroyed, people's livelihood prospered, and aristocratic families perished. Because Li Jiancheng has to examine himself three times every morning: Did I suppress those aristocratic families today? Have I promoted technological development in farming today? Did I show concern for my dear second brother today? ......... Many years later, when Li Shimin stood in the Tai Chi Hall, he couldn't help but sigh to the civil and military officials: "I often say that my eldest brother is the best relative to me. Even if I ask for the moon in the sky, he will agree to it." "Wait a minute, why are you planning to launch a moon landing outside Xuanwu Gate?"