The founder of the Tang Dynasty - Li Shimin.
In 617 AD, Li Yuan was in a time of political turmoil, and he was brilliant and studied the art of war, literature and history. However, he cared about the people's livelihood of the country, but he was powerless to change the status quo of the Sui Dynasty's frequent use of troops and the misery of the people. At this turning point in history, his son Li Shimin is ambitious.
Li Shimin had a big vision, he befriended many heroes early on, and secretly used his vast wealth to entrap Pei Lian, an important friend and loyal assistant. Pei Lin cautiously developed his power in order to wait for the right opportunity.
Until one day, Pei Lin devised a plan to let Li Yuan go to the palace for a drink. When Li Yuan was drunk, suddenly two beautiful palace maids brought them, and it turned out that they were the favorite concubines of Emperor Yang of Sui. Li Yuan was hit by **, and spent a moment of Spring Festival with the two concubines when he was drunk and dreamed of death. After Li Yuan sobered up, he realized that he had been fooled and realized that if the matter was revealed, he would not be spared. 
Just when Li Yuan felt hopeless, Li Shimin and Pei Lin admonished him, persuading him to take the opportunity to raise troops to overthrow the Sui Dynasty and establish a new dynasty. Faced with a desperate situation, Li Yuan decided to accept this suggestion after careful consideration.
In 617 AD, Li Yuan officially raised troops in Taiyuan, established the General's Mansion, and appointed Pei Lin as the chief historian. Li Yuan actively responded to the people's will and grew stronger in a short period of time. In the end, he succeeded in occupying Chang'an and made Yang Yu king, and he himself assumed the position of prime minister. 
In 618, Li Yuan was granted permission by Chan and formally established the Tang Dynasty, becoming the founder of a dynasty with a long history and splendid glory. After the establishment of the Tang State, Li Yuan set out to consolidate his ruling power, quell the unrest of the people, and gradually achieve stability and development.
He is committed to selecting talented people, enriching the best institutions, and putting the country on a prosperous and powerful path.
However, after a long time, Li Yuan faced a difficult decision. He appointed his eldest son Li Jiancheng as the crown prince, but the second son Li Shimin was unwilling, because it is said that Li Yuan had promised him the crown prince. In the next few years, Li Jiancheng began to squeeze out Li Shimin. 
In 626, Li Shimin secretly conspired for a long time and launched the famous Xuanwumen Rebellion. In this coup d'état, Li Jiancheng and Li Yuanji were assassinated, and Li Yuan deposed Li Jiancheng and made Li Shimin the crown prince. Then Li Shimin ascended the throne as emperor, and Li Yuan became the emperor.
With his outstanding talent and wise decision-making ability, Li Shimin successfully unified the imperial program and established the cornerstone of the Tang Dynasty's glory. During his reign, he implemented a series of reform policies, expanding the country's territory, promoting economic prosperity, strengthening military power, and attaching equal importance to civil, political, and military affairs. He also became a great monarch admired by future generations and had a profound impact on Chinese history.
Summary. Li Yuan, as a nobleman from Guanlong in the Northern Zhou Dynasty, chose to raise troops to overthrow the Sui Dynasty and create the Tang Dynasty in a difficult situation. Li Shimin, with his intelligence and political skills, seized the throne in the Xuanwumen Revolution and became the great Taizong of the Tang Dynasty. Together, two generations of leaders, father and son, led a glorious and prosperous era, leaving a dazzling chapter in Chinese history.