To a certain extent, the Sui and Tang dynasties were one, although they were two different dynasties, but whether in terms of blood or inheritance, the Sui and Tang dynasties were inseparable. Empress Wenwen, the wife of Yang Guang, the founding emperor of the Sui Dynasty, and Empress Yuanzhen, the grandmother of Li Yuan, the founding emperor of the Tang Dynasty, were sisters, and they were both daughters of Dugu Xin.
Are Li Shimin and Yang Guang related by blood? Why did Li Shimin refuse to pass on the throne to Concubine Yang's biological son Li Ke?
Are Li Shimin and Yang Guang related by blood? Answer: Yes.
The royal family of the Sui Dynasty and the imperial family of the Tang Dynasty can be said to be relatives of the Eight Classics and are related by blood, and it is very rare for such a close relationship between the other two dynasties in ancient times.
The emperor of the Sui Dynasty and the emperor of the Tang Dynasty were indeed very close relatives by blood, and Dugu Jialuo, the empress of Yang Jian, the founding emperor of the Sui Dynasty, was the youngest sister of Empress Yuanzhen, the mother of Li Yuan, the founding emperor of the Tang Dynasty, and they were both daughters of Dugu Xin, a famous handsome man in the Northern and Southern Dynasties. In terms of talking about it, Li Shimin wants to call Yang Guang "cousin", Emperor Yang Guang of the Sui Dynasty's mother is Dugu Jialuo, the queen of Sui Dynasty literature, and Li Shimin's grandmother, Empress Yuanzhen Dugu, is Dugu Jialuo's sister.
Why did Li Shimin refuse to pass on the throne to Concubine Yang's biological son Li Ke?
Li Ke's biological mother, Concubine Yang, is the daughter of Yang Guang, and it stands to reason that Li Ke has two generations of royal blood, and his status is extremely noble, and it is understandable to inherit the throne. However, in the early Tang Dynasty, the power of the aristocratic gate lords was still strong, and there were five surnames and seven families: Taiyuan Wang's family, Longxi Li family, Qinghe Cui family, etc.
Tang Taizong Li Shimin succeeded to the throne, in order to combat the power of the gate valve, the Li family of Longxi was promoted to the first class family in the world, the queen's eldest grandson family was promoted to the second class family, and the other families were demoted to the third class. The eldest grandson family served as an important military general in the imperial court from the Northern Wei period of the Northern and Southern Dynasties to the peak of power in the early Tang Dynasty. In the family, the eldest grandson is the prime minister above 10,000 people under one person, and the eldest grandson is Li Shimin's wife who was named the queen. The eldest grandson Wuji's elder brother, the eldest grandson Anye, committed the felony of rebellion, but the eldest grandson queen interceded, and Li Shimin pardoned her brother's capital crime, and added the official to the title of Xue Guogong. Although Empress Changsun said that she did not ask for her clansmen to be officials, Li Shimin still made a large number of her clansmen officials.
Li Ke's biological mother's Yang concubine's family, the Yang family, the royal family of the previous dynasty, has been wiped out. Without any gate valve to support him, Li Ke had no hope. Li Shimin will only pass on the son of Empress Changsun and continue to fight against other gate forces.
Li Shimin's chosen heir must be a son who can get the support of the Guanlong Group, Li Ke is standing behind the Jiangnan Shi clan, and Cen Wenwen, who supports Li Ke in the TV series, is the representative of the Jiangnan Shi clan. In the Sui and Tang dynasties, the Jiangnan Shi clan could not afford to make big waves.
Not to mention Li Ke, among all Li Shimin's sons, only the three sons born to Empress Changsun can be valued by Li Shimin, and it is a rule to establish a successor, besides, only one of the three sons of Empress Changsun succeeds to the throne in order to get the support of the Guanlong aristocratic group headed by Changsun Wuji.