It doesn't matter. The former is the hero of the online novelist's novel The Dancing Queen, and the last is the fictional character Dacheng Emperor. The latter is a famous historical figure, the only official queen in Tang Taizong's life, and also the queen of Wende, who was born in famous history. His brother, Sun Chang Wuji, was a famous minister in the Tang Dynasty and the first of the 24 outstanding figures in Lingyange. There is no connection between the two.