Dugu Xin was a royalist loyal to the Western Wei royal family. Although he followed Yu Wenti all the time, he was very dissatisfied with the autocratic rule of Yu Wenti's nephew Yu Wenhu and the bullying of the emperor. Therefore, he cooperated with Zhao Gui, the grand official, to plan to eliminate Yu Wenhu. Unfortunately, the plan was leaked, and Dugu Xin was ultimately forced to commit suicide, leaving the famous general to die in hatred.

Fortunately, the Dugu family had a deep marital relationship with the royal family, so Yu Wenhu did not completely eliminate the Dugu family, leaving some living space for the descendants of the Dugu family. Dugu Xin had seven daughters, but only three of them became queens. Among these three daughters, only the name of Dugu Jialuo, the seventh daughter, was recorded, while the other two daughters were referred to as the Dugu family.

Dugu Xin's eldest daughter, Dugu Shi, married Yu Wenyu, the emperor of the Northern Zhou Dynasty. Because there was a feud between Dugu Shi and Yu Wenhu over the death of her father, Yu Wenhu was unwilling to let Dugu Shi become queen. However, Dugu Shi and Yu Wenyu had been childhood sweethearts with a deep bond, so in the second year of Yu Wenyu's reign, Dugu Shi became queen. However, because Dugu Shi always harbored a grudge against her father's killer and constantly worried about her husband's safety, she soon developed depression and eventually died, being posthumously honored as the Mingjing Queen.

Dugu Xin's fourth daughter, Dugu Shi, married Li Xi, the duke of Tang. Although Li Xi was not very famous, his son, Li Yuan, born to him and Dugu Shi, later became the founding emperor of the Tang Dynasty. To commemorate Dugu Shi, Li Yuan posthumously honored her as the Yuanzhen Queen. There are relatively few records about Dugu Shi, and it is only known that she died on June 6th of the first year of Tang Gaozu's Wude era.

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